Mila Kunis is seen having breakfast with pal Lance Bass and his husband Michael Turchin

Mila Kunis has breakfast with boyfriend Lance Bass and husband Michael Turchin as the couple bring their one-year-old twins

Mila Kunis, 39, was spotted having lunch with NSYNC’s Lance Bass, 44, at a Beverly Hills patio on Friday morning.

The Bye Bye Bye singer’s husband, Michael Turchin, and their one-year-old twins Violet and Alexander were also in attendance.

The That 70s Show alum was dressed very casually in a tan hoodie, matching joggers and white trainers. She had pulled her raven black hair up in a bun.

The It’s Gonna Be Me hitmaker – who works on a show with his friend Robbie Williams – wore a light blue hoodie with a picture of a golden retriever and a duck on it with gray jeans.

The two stars were spotted cuddling and laughing together while eating dinner, entertaining the pop star’s toddlers.

Breakfast couple: Mila Kunis, 39, was spotted having lunch with *NSYNC’s Lance Bass, 44, at a Beverly Hills patio on Friday morning

Cuddle it up: Bye Bye Bye singer husband Michael Turchin and their one-year-old twins Violet and Alexander were there too

Cuddle it up: Bye Bye Bye singer husband Michael Turchin and their one-year-old twins Violet and Alexander were there too

Comfortable sweats: The That 70s Show alum was very casually dressed in a brown hoodie, matching sweatpants and white trainers

Comfortable sweats: The That 70s Show alum was very casually dressed in a brown hoodie, matching sweatpants and white trainers

Comfortable sweats: The That 70s Show alum was very casually dressed in a brown hoodie, matching sweatpants and white trainers

Mila and Lance go way back – only no one knows for sure how far back.

In 2011, she starred in Friends With Benefits with Lance’s bandmate Justin Timberlake.

But they may go back even further, as in 2007, when Lance’s ex-boyfriend Reichen Lehmkuhl was spotted giving the Black Swan actress foot massage poolside in Hawaii.

Bass has recently opened up to PopSugar about what it’s like raising his 19-month-old twins and revealed that he and his husband play them a lot of music all day long.

“They go to sleep with French lullabies. They watch Spanish ‘Sesame Street’ during the day,” he told the outlet. “The kids are also big fans of Selena’s ‘Bidi Bidi Bom Bom.’

“But I haven’t played any *NSYNC stuff for them yet, which is really strange,” Bass admitted. “They don’t often say ‘bye, bye, bye’ when I leave, but they have no idea they’re saying one of my songs.”

“I think every kid loves that, loves to dance,” he said of the hit. ‘I play them up-tempo first and then we can rock them to sleep with God Must Have Spent a Little More Time on You.’

“It’s weird that they’re even of age to enjoy it,” the This I Promise You singer added.

Giggles: The two stars were spotted cuddling and laughing together while eating dinner, entertaining the pop star's toddlers

Giggles: The two stars were spotted cuddling and laughing together while eating dinner, entertaining the pop star’s toddlers

Surprise: It's unclear how long Lance and Mila have known each other

Surprise: It’s unclear how long Lance and Mila have known each other

Bye Bye Bye: The It's Gonna Be Me hitmaker wore a light blue hoodie with a picture of a golden retriever and a duck on it with gray jeans

Bye Bye Bye: The It’s Gonna Be Me hitmaker wore a light blue hoodie with a picture of a golden retriever and a duck on it with gray jeans

Oopsie daisy: Lance and Michael's twins are 19 months old

Oopsie daisy: Lance and Michael’s twins are 19 months old

Bun head: She had her raven black hair pulled up in a bun.

Bun head: She had her raven black hair pulled up in a bun.

Bun head: She had her raven black hair pulled up in a bun.

And he enjoys the little moments in his kids’ days, including their bedtime ritual of sharing a book.

“They really like pop-up and peek-a-boo books, but you can’t leave them alone because they’ll just rip them out,” he admitted. “I learned that the hard way.”

“My favorite thing to do at night is take a bath, read a book to them, and then they start repeating after you,” he says.

“You say a word and they try to repeat it. It’s so great to see them trying so hard,” adding that the twins are “at the stage where they’re picking it all up.”