One family selfie was all it took for Alyson Hannigan’s fans to realise just how strong the genes are in her household.

Thank you for reading this post, don't forget to subscribe!

The American Pie star left fans stunned after sharing a picture alongside her 17-year-old daughter Satyana Marie Denisof, with plenty of people struggling to get past just how alike the pair looked.

Hannigan – also known for playing Willow Rosenberg in Buffy The Vampire Slayer and Lily Aldrin in How I Met Your Mother – posted a smiling selfie of the mother-and-daughter duo from a recent outing.

She said they “had the best time”, but the comments quickly became dominated by something else entirely.

Fans couldn’t believe the resemblance.

“You look like sisters,” one person wrote.

Others went a step further by describing the pair as “twins”, while another joked they could “only see two Alysons”.

Given how similar they appeared in the photograph, social media users inevitably began reaching for the copy-and-paste jokes.

“You really said copy, paste,” one fan quipped.

Another was equally amazed, writing: “Talk about mini me! Wow she’s identical to you.”

Satyana is Hannigan’s eldest daughter with fellow actor Alexis Denisof.

The couple welcomed her in 2009 before having their second daughter, Keeva Jane Denisof, in 2012.

And the story of Hannigan and Denisof’s relationship goes all the way back to one of the shows that helped turn her into a household name.

They first met during the 1990s while working on Buffy The Vampire Slayer.

Hannigan played Willow Rosenberg, while Denisof appeared as Wesley Wyndam-Pryce.

Their relationship didn’t begin immediately, however, with Hannigan previously explaining that they spent a significant amount of time as friends first.

“I was just instantly attracted to him and we were friends for a year and a half before we dated,” Hannigan said.

The pair eventually married in 2003, with Breaking Bad and Seinfeld actress Anna Gunn among those in attendance.

More than two decades later, it was a photograph of Hannigan alongside their eldest daughter that had people doing a double take.

It’s another family moment in a career that has seen Hannigan become particularly recognisable to several generations of television and film fans.

Alongside her role as Willow in Buffy, she famously played Michelle in the American Pie franchise before starring in the hit sitcom How I Met Your Mother.

More recently, Hannigan joined Dancing With The Stars in 2023, where she ultimately finished in fifth place.

She also appeared in the 2026 romantic comedy Solo Mio.

There had meanwhile been plans to revisit another major part of her television history through Buffy: New Sunnydale, a planned reboot of Buffy the Vampire Slayer.

According to lead star Sarah Michelle Gellar, however, the project was scrapped before it could get off the ground in March.

The proposed production had tapped director Chloé Zao and returning co-star David Boreanaz.

Gellar later referenced her famous character while addressing the news, saying: “I promise, if the apocalypse actually comes, you can still beep me.”

Featured image credit: Instagram/alysonhannigan