Mary-Kate, Ashley, and Elizabeth Olsen's Siblings You Didn't Know About

You may have spotted James Trent Olsen in a few of the twins' videos.

James Trent Olsen, son of Jarnette Olsen and David Olsen, is the oldest, goes by Trent, and did dabble in acting. He was in four of his little sisters’ video shorts, including The Adventure of Mary-Kate & Ashley: The Case of the Mystery Cruise and You’re Invited to Mary-Kate & Ashley’s Sleepover Party. Unlike the twins, Trent didn’t take his acting career much further than that. But lucky for Trent, growing up with famous sisters did have a perk or two. "He would sell his sisters' autographed photos," a grade school classmate of Trent told The New York Post in 2014.

Since then, Trent (pictured above with his girlfriend Sue Ellen LaRocca) has kept most of his personal life under wraps. He did graduate from the University of Southern California and, as of 2014, has worked as a comic book writer for Storm King Productions. He also attended Comic-Con in 2015 for the second volume of John Carpenter's Asylum comic book series, which he co-wrote. And for more on Trent's younger sisters, check out How Mary-Kate & Ashley Stopped Elizabeth Olsen From Being a Child Star.

Courtney Taylor Olsen is a fan of her sisters' work.

Courtney Taylor Olsen has the same father as her older half-siblings, but a different mother, McKenzie Olsen. And despite how involved her family has been in Hollywood, Courtney never went into performing. Similar to Trent, she doesn't share much about her personal or professional life online. However, her Instagram shows that she supports Elizabeth's work since she posted a photo at the premiere of Avengers: Infinity War in 2018. She captioned the shot of herself standing next to a poster spotlighting Elizabeth's MCU character Wanda with, "Just admiring my bada** of a sister." Courtney seems to be close with Disney star Madison Pettis and attended the Kids Choice Awards with her in 2017. And for more entertainment news sent to you directly, sign up for our daily newsletter.

Jake Olsen is the baby of the family.

Jake Olsen is the Olsen sisters' younger half-sibling. And while he hasn't seriously tried his hand at acting, he has done some modeling and was a part of a shoot for Runway magazine in 2016. Jake has a pretty lean Instagram account and keeps his life private, but he does seem to be close to his siblings. One of the few shots on his public profile is this one of him hugging Elizabeth. And for more on the Marvel star's younger years, check out what Elizabeth Olsen Almost Did to Distance Herself From Her Sisters.

Despite their different career paths, the Olsens are still very close.

Though they may not share every moment with the public, these six siblings are constantly cheering each other on. And it sounds like having a big family had a lot to do with the relationships they've formed with each other.

"Growing up in our house was always interesting," Jake told Runway. "I learned a lot about respect from everyone in the family. In a family of six kids, you learn it's not always about you."

"It's a lot more normal than you think," he added of his family, referencing the twins' intense childhood fame. "We all support each other's dreams."

For stars who you didn't even know were related, check out 17 Celebrities You Didn't Know Were Siblings.