"You could tell that they have very paternal instincts," a source tells PEOPLE.

By Karen Mizoguchi and Melody Chiu
Updated February 04, 2016 12:00 AM
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It looks as though Zac Efron and girlfriend Sami Mir could make great parents one day!

The couple were spotted enjoying a date night with friends at ROKU restaurant in Los Angeles on Thursday.

“Zac and Sami were mutually super engaging with their friends’ kids,” an on-looker tells PEOPLE. “It was so cute.”

The 28-year-old Dirty Grandpa actor has been dating Miro, 27, since November 2014, and have a dog, Chappelle, together.

“You could tell that they had very paternal instincts as Zac even had one of the kids on his lap at some point, the on-looker explains. “Sami also helped one of the other children wipe their face with their napkin. It was adorable.”

Even with the kids, the night was still a romantic one for the pair.

“They were both laughing and cuddling during dinner and were genuinely enjoying the company of the other family that they were with, the on-looker adds.

Efron gushed about his girlfriend when he stopped by the Ellen DeGeneres Show telling the host, “Things are great. She’s awesome, she’s a superstar.”