Brenda Song is honoring her love on Father's Day. The Running Point star, 37, shared a photo on Instagram of her longtime partner Macaulay Culkin, 44, and one of their two sons in honor of the summer holiday on Sunday, June 15. Culkin could be seen wearing a baseball cap, Converse sneakers and a red, black and white jacket, holding one of the couple's two sons in a baby carrier. "Happy Father’s Day to my one and only @culkamania," Song wrote in her caption. "Seeing you step into fatherhood has been one of the greatest joys of my life." "Thank you for your endless patience, kindness, humor and unconditional love. Your boys and I love you more than you could ever know." Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer​​, from celebrity news to compelling human interest stories. Song and Culkin share sons Dakota, 3, and Carson, 2. That same day, Culkin shared a photo on his Instagram but instead opted to post a snap of Song. The actress could be seen wearing face paint and pictured with glitter in her hair as Culkin thanked his longtime partner for giving him the opportunity to be a dad. "Thanks for making me a papa @brendasong," he wrote. "I literally couldn’t have done it without you. Happy Father’s Day y’all." In May, Song chatted with Entertainment Tonight after a Los Angeles Rams game. The Last Showgirl star opened up about how she has to tell herself to "chill out" on the soccer field sidelines. The actress also shared why she loves sports so much. "My boys play soccer already, and I'm like 'Hey, chill out Brenda.' Participation is all that matters right?" she told the outlet. "I try not to push them. I just encourage them." "The thing I love about sports is it brings a lot of people together," she said. "It's such a wonderful commonality to have, so I'm like, I love the vibes." During a recent conversation with PEOPLE ahead of Mother's Day, Song opened up about life as a working mom of two. "As moms, you are running around all the time," she told PEOPLE. "You have so much on your plate, even when you don't realize it, just because [of] your kids. I mean, these little people depend on you, [and] you do everything for them. And you forget to sometimes take care of yourself." "That's what I really love about a day like Mother's Day, where it's just you take a second to just take a deep breath. And you know what? We deserve a little bit of appreciation. Moms do a lot," Song continued, adding that since becoming a mother she's been able to sympathize more with her own mother's journey. "I look at my mom and I'm like, 'I don't know how she does it,' " she added. "I remember, two weeks after having my first son, I looked at my mom and I was like, 'Mom, I'm so sorry for anything I've ever done to upset you or hurt you or anything.' "