Her parents divorced after 30 years of marriage and Union said, "They handled their divorce and our subsequent transition into a blended family with grace and dignity and respect. I'm lucky that I can just mirror what my parents did and always put the kids first. I'm lucky." On her college football memories, Union reflected, "In my family if you couldn't talk Cornhusker football—that means knowing the black shirt 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.
You’re in that room with every amazingly talented actress of every hue, and it's a dogfight, it's hard".
She appeared in the ABC series Flash Forward alongside John Cho and Joseph Fiennes as Zoey Andata, a role for which she was nominated for an NAACP Image Award for Outstanding Supporting Actress in a Drama Series in 2010.
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.