Alyson Hannigan gave fans a rare look at her teenage daughter this week, and the resemblance was immediate. The "How I Met Your Mother" star shared a family photo featuring 14-year-old Keeva, and commenters quickly pointed out that mother and daughter look nearly identical.

The photo, posted to Hannigan's social media, shows the actress alongside her husband Alexis Denisof and their two daughters. Keeva, the couple's younger child, drew most of the attention. Fans flooded the comments comparing her features to her mother's, with many calling the teen her "twin."

Hannigan, 52, has kept her children largely out of the public eye. She and Denisof, 59, married in 2003 after meeting on the set of "Buffy the Vampire Slayer." They also share daughter Satyana, 17. The couple has rarely posted images of their kids, making this week's photo a notable exception.

The actress rose to fame as Willow Rosenberg on "Buffy the Vampire Slayer" from 1997 to 2003, then spent nine seasons as Lily Aldrin on "How I Met Your Mother." She has since worked steadily in television, including hosting the competition series "Penn & Teller: Fool Us."

Denisof, an actor and director, played Wesley Wyndam-Pryce on both "Buffy" and its spinoff "Angel." The pair have been together for more than two decades, a rarity in an industry known for short-lived marriages.

Celebrity children rarely appear in their parents' posts, and when they do, the internet tends to notice. This week's reaction followed a familiar pattern: a single image, a wave of comments about genetics, and renewed interest in a star who has stayed mostly out of the tabloids.

Hannigan has spoken in past interviews about prioritizing her family over Hollywood's social circuit. She told People in 2021 that she and Denisof focused on keeping their daughters grounded. "We just try to keep it normal," she said at the time.

The photo drew thousands of reactions within hours. Several outlets, including E! News, picked up the story. Neither Hannigan nor Denisof has commented publicly on the response.

Fans hoping for more glimpses of the family may be waiting a while. Hannigan's posting history suggests the photo was an exception, not a new habit.