Lake Siegel Bell (born March 24, 1979) is an American actress, screenwriter, and director. She has appeared in various television series, including Boston Legal (2004–2006), Surface (2005–2006), How to Make It in America (2010–2011), Childrens Hospital (2008–2016), and Bless This Mess (2019–2020) and in films including Over Her Dead Body (2008), What Happens in Vegas (2008), It's Complicated (2009), No Strings Attached (2011), Million Dollar Arm (2014), No Escape (2015), Man Up (2015), The Secret Life of Pets (2016), Shot Caller (2017), Home Again (2017), The Secret Life of Pets 2 (2019), and Black Panther: Wakanda Forever (2022).
She wrote and directed the short film Worst Enemy, which debuted at the Sundance Film Festival in 2012, followed by her 2013 feature film directing debut, In a World..., in which she also starred. In 2017, she directed, wrote, co-produced, and starred in I Do... Until I Don't. Bell has also voiced Poison Ivy in the Max series Harley Quinn (2019–present) and Black Widow in the Disney+ series What If...? (2021).
