Girls star Jemima Kirke painted a portrait of Liv Tyler's bare baby bump -- see the Instagram photo!

So fun to be painted by a friend!!!! @rafaizzy ???????????? Brooklyn ny

???? ???????????? Liv Tyler (@misslivalittle) ??? 10, 2015 at 12:54 PST

Silly Saturday! Pregnant Liv Tyler posted an adorable photo of her bare baby bump via Instagram on Saturday, Jan. 10. The reason? Girls star Jemima Kirke was ready to roll up her sleeves and paint a portrait of her!

"So fun to be painted by a friend!!!! @rafaizzy Brooklyn ny," Tyler, 37, captioned the shot. Steven Tyler's daughter beamed in the selfie as Kirke stood behind her with a blank canvas and paint brushes. Tyler went makeup-free, only wearing an unzipped hoodie and purple lace bra.

Beautiful talented special totally 1 of a kind dear friend Jemima Kirke @rafaizzy painting me!!!!!!

A photo posted by Liv Tyler (@misslivalittle) on Jan 10, 2015 at 12:50pm PST

Tyler also took a photo while Kirke was in the zone. "Beautiful talented special totally 1 of a kind dear friend Jemima Kirke @rafaizzy painting me!!!!!!" the Leftovers actress wrote. 

Us confirmed in September that Tyler is expecting a little one with her boyfriend Dave Gardner. She's already mom to 9-year-old son Milo William, whom she shares with ex-husband Royston Langdon.