The birthday of Mark Wahlberg's eldest child is also a bittersweet day for his family.
Wahlberg celebrated his daughter Ella's 18th birthday on Thursday, September 2, while also marking 18 years since the loss of his sister Debbie, who died at 43 in 2003 on the day Ella was born.
The actor, 50, took to Instagram to share a sweet snap of him with daughter Ella as a toddler as well as a throwback picture of him with his arms wrapped around late sister Debbie.
"Happy B day my Ella. 18 years old wow how time flies," he wrote. "So proud of you!! Always A bitter Sweet day. Missing my big sister Debbie. Ella’s Guardian angel."
Debbie was one of Wahlberg's eight siblings, while Ella is the oldest of four children with wife Rhea Durham.
The couple, who celebrated their 12th wedding anniversary last month, are also proud parents to Michael, 15, Brendan, 12, and Grace, 11.
Wahlberg's wife also celebrated Ella's milestone birthday with a tribute on Instagram, showing her daughter in a Bart Simpson shirt.
"How are you 18!?!?" she wrote. "Happy Birthday my sweet, smart, FUNNY, beautiful, kind & no crap taking girl! Make 18 your best year yet!!"
It comes as Wahlberg opened up about just how tough parenting in the public eye can be, as he admitted that he watches his children's sports games from afar.
Speaking to Entertainment Tonight, the Ted actor explained that he tries to give his four children - Ella, 17, Michael, 15, Brendan, 12, and Grace, 11, whom he shares with wife Rhea Durham - as much of a normal life as possible.
"Me being in the public eye, there are pros to that, but there's a lot of cons," he said.
"My kids wanna have their own identity, you know? I'm not allowed to get out of the car at football practice or a game," he said. "I gotta sit in the car and watch."
"At first I took it personally, because I wanna be there to support them, but supporting them is by making them feel comfortable in what they're doing and them having their own identity too. It's very difficult."