Reese Witherspoon Celebrates 40th Birthday By Singing 'Sweet Home Alabama'

PHOTO: Reese Witherspoon hosts the 93rd Annual National Christmas Tree Lighting at The Ellipse, Dec. 3, 2015 in Washington.PlayPaul Morigi/Getty Images
WATCH Reese Witherspoon Celebrates her 40th Birthday

It looks like Reese Witherspoon is starting her birthday celebration early.

The actress, who will turn 40 on March 22, feted her big day with a party at the Warwick, in Hollywood, California, according to People magazine.

Along with her husband Jim Toth, the Oscar winner celebrated with Taylor Swift, who performed, Robert Downey Jr. and wife Susan Downey, Jennifer Aniston and husband Justin Theroux, Matthew McConaughey and wife Camila Alves, Tobey Maguire and wife Jennifer Meyer, Courteney Cox, and Kate Hudson, who posted photos of the party.

A photo posted by Kate Hudson (@katehudson) on Mar 20, 2016 at 3:14am PDT

Keith Urban was also in attendance, along with his wife Nicole Kidman, and performed for the birthday girl. Witherspoon also got up on stage when the country singer performed "Sweet Home Alabama," a nod to the actress hit 2002 romantic comedy.

Witherspoon was excited before her party even began. She posted a couple of photos on Instagram, including one with her mother, Betty Reese.

Happy Saturday y'all!! ??#BirthdayWeekend

A photo posted by Reese Witherspoon (@reesewitherspoon) on Mar 19, 2016 at 8:25pm PDT

Crazy on the dance floor? ?????? #BirthdayWeekend #MomsInTown ????

A video posted by Reese Witherspoon (@reesewitherspoon) on Mar 19, 2016 at 9:32pm PDT