Foster began acting with her debut role in the 2004 film
D.E.B.S. She starred in roles in
The Big Bounce, Entourage,
Crossing Jordan, CSI: Crime Scene Investigation, and
Psych 9. In 2009, Foster started in the recurring role of Jen Clark on
The CW drama series
90210. She briefly hosted
Entertainment Tonight spin-off
ET on MTV in 2002. She has also appeared in the
Backstreet Boys music video "
Shape of My Heart", as well as music video for "Drop That Baby" by
The Wondergirls. In 2015, she and her sister
Erin Foster created the TV series
Barely Famous on
VH1. The show was a
mockumentary satire of
reality TV and ran for two seasons. From 2017 to 2020, Foster and her sister Erin were co-creative heads for
Bumble. Since 2021, Foster and Erin host a
podcast, ''The World's First Podcast with Erin & Sara Foster''. Foster and Erin co-produced the 2024 Netflix series "
Nobody Wants This", inspired by Erin's real-life love story. Foster described herself as "an ally" for the Jewish people, citing the way Judaism "has brought our family together". ==Personal life==