Reese Witherspoon's 50th birthday party draws A-list crowd to Lainey Wilson's Nashville bar

Reese Witherspoon celebrated her star-studded 50th birthday in Nashville at Lainey Wilson's bar.

A source told People that Witherspoon was the "belle of the ball" on Saturday night.

Wilson's bar, Bayou Keys, was closed for a private event March 21, according to the outlet, and Nicole Kidman, Isla Fisher and Mariska Hargitay were all in attendance.

"Reese was the belle of the ball. The room had so much love for her all night, and she seemed so happy to be surrounded by her family and friends," the source said.