Who Plays Liam On Sullivan's Crossing? Where You've Seen The Actor Before

Updated Jul 23, 2026, 6:10 PM EDT Cher Thompson is a Senior Staff Writer at Screen Rant, where she covers everything from explosive reality TV moments to cast interviews about the twists and turns of scripted dramas. With a background in creative writing, marketing, and teaching, Cher knows how to spot both the storytelling genius and the guilty pleasures in pop culture. Her work blends wit with insight, making readers feel like they’re chatting with a friend who just happens to know way too much about TV. When Sullivan's Crossing season 3 came to a close with a massive cliffhanger surrounding Maggie Sullivan's (Morgan Kohan) surprise husband, Liam Davies (Marcus Rosner), viewers were shocked to hear that she'd been keeping such a huge secret. Having previously described Liam as a summer fling, Sullivan's Crossing season 4 delved into the relationship between Maggie and Liam, which took a massive toll on her renewed relationship with Cal Jones (Chad Michael Murray) and shook things up all over Timberlake. The show's love triangle, which was a riveting part of the show's most recent season, boiled over with complicated, intense emotion. With Sullivan's Crossing season 4 having come to a close and Liam's character exiting Timberlake with the door to his relationship with Maggie firmly shut, it's likely that Rosner won't return to the show when it comes back. Sullivan's Crossing season 5, which will likely explore more of the complexities in Maggie's relationship with Cal as they tackle what comes next in their journey together, will see a lot of changes in Timberlake as the Crossing continues to shift and grow. While Rosner's Liam may not be coming back to the series, he's a familiar face to Sullivan's Crossing viewers. Where You've Seen Marcus Rosner Before Liam is played by Canadian actor Marcus Rosner. Rosner, 36, was born in Campbell River, British Columbia, Canada, and has appeared in several television shows and films. His first major role was in the CW television film, Joey Dakota, as Ty. Rosner is also known for playing roles in TV series, including Charles Kensington on When Calls the Heart, Warren on Unreal, and Austin McMurray on Ride. He's also appeared on The Secret Circle, Arrow, Untold Stories of the ER, Supernatural, Once Upon a Time, Girlfriends' Guide to Divorce, and Mistresses. Rosner has also starred in many TV movies for Hallmark Channel, Lifetime, Great American Family, UpTV, and Prime Video. His Hallmark films include Garage Sale Mystery: All That Glitters for Hallmark Movies & Mysteries Channel, in which he played Tim. Rosner also starred in several Hallmark Channel films, including A Christmas Detour (Jack Collins), A Harvest Wedding (Tom Nichols), Christmas in Evergreen (Spencer), Flipping for Christmas (Bo), Love on the Right Course (Daniel), and Falling Like Snowflakes (Noah). Rosner also portrayed Marcus in Love on Harbor Island opposite his Sullivan's Crossing co-star, Morgan Kohan, as Lily. Rosner also played Marco DeLuca in Hallmark Channel's Autumn in the Vineyard, Summer in the Vineyard, and Valentine in the Vineyard. For Hallmark Movies Now, he played Mark in An Ice Palace Romance. In addition to his Hallmark movies, Rosner has starred in movies for Lifetime. They include Infidelity in Suburbia (Elliot Graverston), Maternal Instinct (Marshall Lancaster), Pointsettias for Christmas (Sean Dalton), The Killer Downstairs (James Brewer), Sweet Mountain Christmas (Robbie), Killer in the Guest House (Mark James), and Christmas with a Crown (Prince Nicholas). In keeping with his influx of TV movies, Rosner has also starred in the Great American Family films such as Christmas in Maple Hills as Walker Jennings and Coupled Up for Christmas as Peter Brooks. He's also played roles in UpTV television films, including Love Stories in Sunflower Valley (Drew Hutton) and A Vineyard Romance (Liam Hawthorne). In addition, Rosner starred in the Prime Video film My Fake Boyfriend as Nico. Rosner has several other television credits in his career as well, including guest roles on Supernatural, UnReal, Mistresses, and Sex/Life. How Liam's Character Changed Sullivan's Crossing After Sullivan's Crossing season 4 premiere, it was clear that Liam's arrival was going to be tough for Maggie and Cal's relationship. Throughout the season, the pair had a tough time navigating their romance, especially as Liam tried to rekindle things with his one-time wife. While Maggie told her that Lola met Liam while she was on vacation in Europe, after they accidentally switched suitcases at the airport, and he showed up at her hotel to return hers, the truth behind their relationship wasn't as light and airy, bringing back some big emotions for Maggie. Dealing with Liam's trauma wound up being a big part of Sullivan's Crossing season 4, as did figuring out whether or not Maggie would leave her relationship with Cal behind in order to be with someone from her past. Despite Liam finally winding up leaving Timberlake behind and Maggie mending things with Cal, his time on the series served a purpose. While Maggie and Cal had been through a lot prior to Liam's return, knowing that she was truly committed to Cal after Liam's departure makes the core relationship of Sullivan's Crossing that much stronger. Release Date March 19, 2023 Network CTV Directors Chris Grismer, April Mullen, Jonathan Wright, Martin Wood Cast Morgan Kohan Maggie Sullivan Chad Michael Murray Cal Jones Writers Robyn Carr Creator(s) Roma Roth