diff --git a/API b/API
index 98900f5f0..072513601 100644
--- a/API
+++ b/API
@@ -6,9 +6,9 @@ create_style_guide(initialize = default_style_guide_attributes, line_break = NUL
 default_style_guide_attributes(pd_flat)
 specify_math_token_spacing(zero = "'^'", one = c("'+'", "'-'", "'*'", "'/'"))
 specify_reindention(regex_pattern = NULL, indention = 0, comments_only = TRUE)
-style_dir(path = ".", ..., style = tidyverse_style, transformers = style(...), filetype = "R", recursive = TRUE, exclude_files = NULL, include_roxygen_examples = TRUE)
+style_dir(path = ".", ..., style = tidyverse_style, transformers = style(...), filetype = c("R", "Rprofile"), recursive = TRUE, exclude_files = NULL, include_roxygen_examples = TRUE)
 style_file(path, ..., style = tidyverse_style, transformers = style(...), include_roxygen_examples = TRUE)
-style_pkg(pkg = ".", ..., style = tidyverse_style, transformers = style(...), filetype = "R", exclude_files = "R/RcppExports.R", include_roxygen_examples = TRUE)
+style_pkg(pkg = ".", ..., style = tidyverse_style, transformers = style(...), filetype = c("R", "Rprofile"), exclude_files = "R/RcppExports.R", include_roxygen_examples = TRUE)
 style_text(text, ..., style = tidyverse_style, transformers = style(...), include_roxygen_examples = TRUE)
 tidyverse_math_token_spacing()
 tidyverse_reindention()
diff --git a/NEWS.md b/NEWS.md
index c072df7f8..f193e0868 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -12,6 +12,8 @@
 * curlyl-curly (`{{`) syntactic sugar introduced with rlang 0.4.0 is now 
   explicitly handled, as opposed previously where it was just treated as two 
   consequtive curly braces (#528).
+* `style_pkg()`, `style_dir()` and the Addins can now style `.Rprofile`, and 
+  hidden files are now also styled (#530).
 
 ## Minor improvements and fixes
 
diff --git a/R/addins.R b/R/addins.R
index 1f9c2c711..367b9ce9e 100644
--- a/R/addins.R
+++ b/R/addins.R
@@ -52,12 +52,17 @@ style_active_file <- function() {
   transformer <- make_transformer(get_addins_style_transformer(),
     include_roxygen_examples = TRUE, warn_empty = is_plain_r_file(context$path)
   )
+  is_r_file <- any(
+    is_plain_r_file(context$path),
+    is_unsaved_file(context$path),
+    is_rprofile_file(context$path)
+  )
 
   if (is_rmd_file(context$path)) {
     out <- transform_mixed(context$contents, transformer, filetype = "Rmd")
   } else if (is_rnw_file(context$path)) {
     out <- transform_mixed(context$contents, transformer, filetype = "Rnw")
-  } else if (is_plain_r_file(context$path) | is_unsaved_file(context$path)) {
+  } else if (is_r_file) {
     out <- try_transform_as_r_file(context, transformer)
   } else {
     abort("Can only style .R, .Rmd and .Rnw files.")
diff --git a/R/set-assert-args.R b/R/set-assert-args.R
index b96563dce..4f0d57295 100644
--- a/R/set-assert-args.R
+++ b/R/set-assert-args.R
@@ -38,9 +38,9 @@ set_and_assert_arg_filetype <- function(filetype) {
 #' @importFrom rlang abort
 #' @keywords internal
 assert_filetype <- function(lowercase_filetype) {
-  if (!all(lowercase_filetype %in% c("r", "rmd", "rnw"))) {
+  if (!all(lowercase_filetype %in% c("r", "rmd", "rnw", "rprofile"))) {
     abort(paste(
-      "filetype must not contain other values than 'R',",
+      "filetype must not contain other values than 'R', 'Rprofile',",
       "'Rmd' or 'Rnw' (case is ignored)."
     ))
   }
diff --git a/R/transform-code.R b/R/transform-code.R
index 931969515..cc425d571 100644
--- a/R/transform-code.R
+++ b/R/transform-code.R
@@ -9,7 +9,7 @@
 #' @importFrom rlang abort
 #' @keywords internal
 transform_code <- function(path, fun, ...) {
-  if (is_plain_r_file(path)) {
+  if (is_plain_r_file(path) || is_rprofile_file(path)) {
     transform_utf8(path, fun = fun, ...)
   } else if (is_rmd_file(path)) {
     transform_utf8(path,
diff --git a/R/ui.R b/R/ui.R
index 13b879967..02d2a84c3 100644
--- a/R/ui.R
+++ b/R/ui.R
@@ -20,8 +20,9 @@ NULL
 #'   conveniently constructed via the `style` argument and `...`. See
 #'   'Examples'.
 #' @param filetype Vector of file extensions indicating which file types should
-#'   be styled. Case is ignored, and the `.` is optional, e.g. `c(".R", ".Rmd",
-#'   ".Rnw")` or `c("r", "rmd", "rnw")`.
+#'   be styled. Case is ignored, and the `.` is optional, e.g.
+#'   `c(".R", ".Rmd")`, or `c("r", "rmd")`. Supported values (after
+#'   standardization) are: "r", "rprofile", "rmd", "rnw".
 #' @param exclude_files Character vector with paths to files that should be
 #'   excluded from styling.
 #' @param include_roxygen_examples Whether or not to style code in roxygen
@@ -71,7 +72,7 @@ style_pkg <- function(pkg = ".",
                       ...,
                       style = tidyverse_style,
                       transformers = style(...),
-                      filetype = "R",
+                      filetype = c("R", "Rprofile"),
                       exclude_files = "R/RcppExports.R",
                       include_roxygen_examples = TRUE) {
   pkg_root <- rprojroot::find_package_root_file(path = pkg)
@@ -86,7 +87,7 @@ prettify_pkg <- function(transformers,
                          exclude_files,
                          include_roxygen_examples) {
   filetype <- set_and_assert_arg_filetype(filetype)
-  r_files <- vignette_files <- readme <- NULL
+  r_files <- rprofile_files <- vignette_files <- readme <- NULL
 
   if ("\\.r" %in% filetype) {
     r_files <- dir(
@@ -95,6 +96,13 @@ prettify_pkg <- function(transformers,
     )
   }
 
+  if ("\\.rprofile" %in% filetype) {
+    rprofile_files <- dir(
+      path = ".", pattern = "^\\.rprofile$",
+      ignore.case = TRUE, recursive = FALSE, full.names = TRUE,
+      all.files = TRUE
+    )
+  }
   if ("\\.rmd" %in% filetype) {
     vignette_files <- dir(
       path = "vignettes", pattern = "\\.rmd$",
@@ -113,7 +121,10 @@ prettify_pkg <- function(transformers,
     )
   }
 
-  files <- setdiff(c(r_files, vignette_files, readme), exclude_files)
+  files <- setdiff(
+    c(r_files, rprofile_files, vignette_files, readme),
+    exclude_files
+  )
   transform_files(files, transformers, include_roxygen_examples)
 }
 
@@ -167,7 +178,7 @@ style_dir <- function(path = ".",
                       ...,
                       style = tidyverse_style,
                       transformers = style(...),
-                      filetype = "R",
+                      filetype = c("R", "Rprofile"),
                       recursive = TRUE,
                       exclude_files = NULL,
                       include_roxygen_examples = TRUE) {
@@ -193,7 +204,8 @@ prettify_any <- function(transformers,
                          include_roxygen_examples) {
   files <- dir(
     path = ".", pattern = map_filetype_to_pattern(filetype),
-    ignore.case = TRUE, recursive = recursive, full.names = TRUE
+    ignore.case = TRUE, recursive = recursive, full.names = TRUE,
+    all.files = TRUE
   )
   transform_files(
     setdiff(files, exclude_files), transformers, include_roxygen_examples
diff --git a/R/utils-files.R b/R/utils-files.R
index a86056a04..d1c0c6db4 100644
--- a/R/utils-files.R
+++ b/R/utils-files.R
@@ -2,6 +2,9 @@ is_plain_r_file <- function(path) {
   grepl("\\.R$", path, ignore.case = TRUE)
 }
 
+is_rprofile_file <- function(path) {
+  grepl(".rprofile", path, ignore.case = TRUE)
+}
 is_rmd_file <- function(path) {
   grepl("\\.Rmd$", path, ignore.case = TRUE)
 }
diff --git a/man/prettify_any.Rd b/man/prettify_any.Rd
index bc2fa9c97..e6ffed554 100644
--- a/man/prettify_any.Rd
+++ b/man/prettify_any.Rd
@@ -13,7 +13,9 @@ conveniently constructed via the \code{style} argument and \code{...}. See
 'Examples'.}
 
 \item{filetype}{Vector of file extensions indicating which file types should
-be styled. Case is ignored, and the \code{.} is optional, e.g. \code{c(".R", ".Rmd", ".Rnw")} or \code{c("r", "rmd", "rnw")}.}
+be styled. Case is ignored, and the \code{.} is optional, e.g.
+\code{c(".R", ".Rmd")}, or \code{c("r", "rmd")}. Supported values (after
+standardization) are: "r", "rprofile", "rmd", "rnw".}
 
 \item{recursive}{A logical value indicating whether or not files in subdirectories
 should be styled as well.}
diff --git a/man/style_dir.Rd b/man/style_dir.Rd
index 3976cf43a..1affe1753 100644
--- a/man/style_dir.Rd
+++ b/man/style_dir.Rd
@@ -5,8 +5,9 @@
 \title{Prettify arbitrary R code}
 \usage{
 style_dir(path = ".", ..., style = tidyverse_style,
-  transformers = style(...), filetype = "R", recursive = TRUE,
-  exclude_files = NULL, include_roxygen_examples = TRUE)
+  transformers = style(...), filetype = c("R", "Rprofile"),
+  recursive = TRUE, exclude_files = NULL,
+  include_roxygen_examples = TRUE)
 }
 \arguments{
 \item{path}{Path to a directory with files to transform.}
@@ -23,7 +24,9 @@ conveniently constructed via the \code{style} argument and \code{...}. See
 'Examples'.}
 
 \item{filetype}{Vector of file extensions indicating which file types should
-be styled. Case is ignored, and the \code{.} is optional, e.g. \code{c(".R", ".Rmd", ".Rnw")} or \code{c("r", "rmd", "rnw")}.}
+be styled. Case is ignored, and the \code{.} is optional, e.g.
+\code{c(".R", ".Rmd")}, or \code{c("r", "rmd")}. Supported values (after
+standardization) are: "r", "rprofile", "rmd", "rnw".}
 
 \item{recursive}{A logical value indicating whether or not files in subdirectories
 of \code{path} should be styled as well.}
diff --git a/man/style_pkg.Rd b/man/style_pkg.Rd
index 2463dd0f0..044fe21f2 100644
--- a/man/style_pkg.Rd
+++ b/man/style_pkg.Rd
@@ -5,7 +5,7 @@
 \title{Prettify R source code}
 \usage{
 style_pkg(pkg = ".", ..., style = tidyverse_style,
-  transformers = style(...), filetype = "R",
+  transformers = style(...), filetype = c("R", "Rprofile"),
   exclude_files = "R/RcppExports.R", include_roxygen_examples = TRUE)
 }
 \arguments{
@@ -23,7 +23,9 @@ conveniently constructed via the \code{style} argument and \code{...}. See
 'Examples'.}
 
 \item{filetype}{Vector of file extensions indicating which file types should
-be styled. Case is ignored, and the \code{.} is optional, e.g. \code{c(".R", ".Rmd", ".Rnw")} or \code{c("r", "rmd", "rnw")}.}
+be styled. Case is ignored, and the \code{.} is optional, e.g.
+\code{c(".R", ".Rmd")}, or \code{c("r", "rmd")}. Supported values (after
+standardization) are: "r", "rprofile", "rmd", "rnw".}
 
 \item{exclude_files}{Character vector with paths to files that should be
 excluded from styling.}
diff --git a/tests/testthat/public-api/xyzpackage/.Rprofile b/tests/testthat/public-api/xyzpackage/.Rprofile
new file mode 100644
index 000000000..8d2f0971e
--- /dev/null
+++ b/tests/testthat/public-api/xyzpackage/.Rprofile
@@ -0,0 +1 @@
+1 + 1