Credit: Gary Gershoff/WireImage; Kevork Djansezian/Getty Images

The #threefictionalcharacters craze on social media Instagram has celebrities joining in, too!

Sarah Michelle Gellar posted a picture of the three characters that best described her on Friday – all played by Charmed actress Shannen Doherty.

“Hey @theshando I’ve taken describe yourself in #threecharacters one step further…here’s me in three characters played by you lol #ShannenDoherty,” she captioned.

Doherty responded with an adorable photo of her own.

In a #FlashbackFriday post, she shared a snapshot of the two friends heading to a Ricky Martin concert.

“My #fbf is with @sarahmgellar cause she’s always made me laugh like this. And…. Just to date this picture, we were heading to a Ricky Martin concert…… Which was fantastic btw,” Doherty wrote.

The duo have always shared a special bond.

In August, the Buffy the Vampire Slayer actress posted a touching tribute to Doherty on Instagram, calling her a “true friend.”

“My #mondaymuse (and really every day #muse) is my brave friend @theshando,” Gellar’s post read. “I’ve always said she is one of the most loyal friends I’ve ever known, and now while she is facing the toughest journey of her life, she is sharing it with friends she has never met in the hopes of helping other people who are going through the same struggle. That’s a true friend #FuckCancer.”