Sherri Michelle Saum is an American actress. Saum is best known for her co-lead role as Lena Adams Foster in the Freeform drama series The Fosters (2013–2018) as well as a subsequent guest star role in its spinoff Good Trouble (2019–2024). She is also known for her television roles in Beggars and Choosers, Rescue Me, In Treatment and Locke & Key, as well as for her roles in the daytime soap operas Sunset Beach and One Life to Live.

The Fosters is an American family drama television series created by Peter Paige and Bradley Bredeweg. It premiered in the United States on June 3, 2013, on the ABC Family television network and concluded on June 6, 2018. It followed the lives of the Adams-Foster family led by a lesbian couple, Stef Foster, a police officer, and Lena Adams, a school vice principal, who raise one biological son and four adopted teenagers in San Diego, California.