Gabrielle Monique Union-Wade (born October 29, 1972) is an American actress, activist, and author. She began her career in the 1990s, appearing on television sitcoms, before landing supporting roles in teenage comedic films She's All That and 10 Things I Hate About You (1999). Her breakthrough role was in the 2000 film Bring It On.

Union is also known for her performances in the romantic comedy films The Brothers (2001), Deliver Us from Eva (2003), Daddy's Little Girls (2007), Think Like a Man (2012) and Think Like a Man Too (2014). She also had starring roles in CBS medical drama series City of Angels (2000) and films Bad Boys II (2003), Cradle 2 the Grave (2003), the critically acclaimed Neo Ned (2005), Cadillac Records (2008), Top Five (2014) and Breaking In (2018). In 2013, Union began starring as lead character in the BET drama series Being Mary Jane, for which she has received critical acclaim and an NAACP Image Award. She co-starred in the 2016 film The Birth of a Nation, and next appeared in Almost Christmas (2016) and Sleepless (2017).

Union is also the author of a memoir, We're Going to Need More Wine (2017), and an activist who works on issues around women's health and violence against women.