Reese Witherspoon Goes Big For Her 40th Birthday With a Private Concert From Taylor Swift

Tuesday marks a major milestone for Reese Witherspoon, as it will be her 40th birthday. On Saturday, the actress got a head start on the celebration with a night out on the town with a huge group of her famous pals, including Kate Hudson, Jennifer Aniston, Justin Theroux, Chris Martin, Courteney Cox, Sarah Paulson, Matthew McConaughey, Isla Fisher, and Tobey Maguire. In addition to Reese's friends stepping out, she also got a private concert from Taylor Swift and hit the stage with Keith Urban!

Fortunately, both Reese and Kate took to social media to document their night. The mom of Ava, Deacon, and Tennessee shared a few fun pictures on Snapchat and Instagram, including a gorgeous birthday snap of herself in a sparkly minidress with a caption that read, "Happy Saturday y'all!! #BirthdayWeekend." Kate, on the other hand, opted for a festive photo collage and wrote, "When you take a sh*t load of pictures and you still don't have it perfect so you go for the ole collage post....Happy Birthday gorgeous girl @reesewitherspoon !!! Love you #TequillaFirst #PostingLater #SaturdayNight #ImSoExcitedToGetIntoBedIDontEvenKnowWhatToDoWithMyself #NotWashingMyFace #GoodNight." Keep reading to see more of the girls' night out, and then check out even more celebrities who are turning 40 this year.