"Who wore it better?" she asked in her #TBT post, although it's really more of a throwback for Leo, whose spiky-haired picture is from the 1997 premiere of "Titanic."

Who wore it better? ???? #Hairspiration @leonardodicaprio

A post shared by Kate Hudson (@katehudson) on

Hudson revealed on a recent appearance on "Ellen" that she shaved her hair for a movie called "Sister" that she made with singer Sia. According to IMDb, it's "the story of a sober drug dealer and their disabled sister" and is due sometime in 2018. Sia wrote and directed the movie, which Hudson says is a musical. "It called for me to shave my head and I said, 'Absolutely.' Anything for Sia."

She joked that she's going to bring back the mullet next, for which we suggest a "who wore it better" with David Spade's "Joe Dirt."

Leo's on Instagram too, but his feed is mostly about saving the environment. (So, not that many selfies.)