Gabrielle Monique Union-Wade (née Union; born October 29, 1972) is an American actress, model and author. Her career began in the 1990s, when she made dozens of appearances on television sitcoms before landing supporting roles in 1999 teen films She's All That and 10 Things I Hate About You. Her breakthrough role arrived the following year in the teen film Bring It On.

Union is 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 the CBS medical drama series City of Angels (2000) and in the films Bad Boys II (2003), Cradle 2 the Grave (2003), Neo Ned (2005), Cadillac Records (2008), Top Five (2014), Breaking In (2018), and The Perfect Find (2023). She has also co-starred in the films The Birth of a Nation (2016), Almost Christmas (2016) and Sleepless (2017).

Union starred as the lead characters in BET drama series Being Mary Jane (2013–2019), for which she has received an NAACP Image Award, and in the crime series L.A.'s Finest (2019–2020). Outside of acting, Union has written four books: two memoirs, titled We're Going to Need More Wine (2017) and You Got Anything Stronger? (2021), and two children's books, titled Welcome to the Party (2020) and Shady Baby (2021).

At the age of 19, Union was attacked and raped at gunpoint. She has been an outspoken advocate for issues involving women's health, LGBTQ+ equality, and violence against women, and was awarded the President's Award from the NAACP Image Awards, alongside her husband Dwyane Wade for their humanitarian efforts. Union was included on Time's list of the 100 most influential people in the world in 2020.

Union was born on October 29, 1972, in Omaha, Nebraska, the daughter of Theresa (née Glass), a phone company manager and social worker, and Sylvester E. Union, a military sergeant. She was raised Catholic. During her childhood, she was taught to be "an independent woman, standing on my own two feet, and that's the road I opted to take." According to Union, her mother taught her to have a "world perspective" and took her to a gay pride parade at the age of eight after the family moved to Pleasanton, California. She attended Foothill High School where she was a year-round student athlete, competing in varsity soccer, track, and basketball. Union dated fellow student Jason Kidd during her junior year.

Union's parents divorced after 30 years of marriage. She said, "They handled their divorce and our subsequent transition into a blended family with grace, dignity and respect. They always put us first and didn't involve us. I'm lucky that I can just mirror what my parents did and always put the kids first. They're pretty awesome. I'm lucky."

Union grew up with self-esteem issues relating to colorism, as one of the few African-American children in her environment. When Union was younger, she believed that "blonde was the ideal of beauty, and if I looked nothing like that, then I must be ugly." On her college football memories, Union reflected, "In my family if you couldn't talk Cornhusker football—that means knowing the Blackshirt defense, knowing the I-back formation—then you don't get to have an opinion. When I first toured the Nebraska campus and I saw Turner Gill walk, I freaked out. That was like the biggest star-struck moment I've probably ever had in my life. But it's because I grew up in a household that always talked specifically Cornhusker football and Big 8 sports at the time."

During the summer before starting her sophomore year of college at UCLA, at the age of 19, Union was attacked and raped at gunpoint at her part-time job at a Payless shoe store by a robber. Union has said she would not have survived the attack had it not been for self-defense lessons from Oprah Winfrey's talk show. She successfully sued Payless for negligence, alleging that the store failed to warn employees about the assailant, who had previously been identified robbing another Payless location.