Reese Witherspoon is stylish and funny ... and she's also ageless!

And in case you needed any proof, the 39-year-old took to Instagram with an epic #TBT.

#TBT My first film festival #Deauville in 1991, age 15 #BackInTheDay 😜

A photo posted by Reese Witherspoon (@reesewitherspoon) on

"#tbt My first film festival #Deauville in 1991, age 15 #BackInTheDay 😜," Reese captioned the pic.

Funny enough, the actress also looks like she could be her daughter Ava's twin.

Reese's daughter, 16, posted this photo on social media a few weeks ago and their resemblance is uncanny.

congrats! #specialnight

A photo posted by Ava Phillippe (@avaphillippe) on

"congrats! #specialnight," Ava Phillippe wrote on the post.

Talk about good genes!