Mila Kunis turned 31 on Friday.

So how does a pregnant actress celebrate her special day? With yoga, sushi, and ice cream, of course.

According to E! News, Kunis got in a session of maternity yoga earlier in the day, then set out with fiancé Ashton Kutcher for a casual birthday bash.

A source told E! the couple began their date with a relaxing dinner at a sushi restaurant in Los Angeles before heading to Sweet Rose Creamery for some ice cream for dessert.

“They were very hands on—hugging, holding hands throughout the night,” the source said. “They waited in a long line, holding on to one another the entire time. They appeared happy and seemed as if they were really enjoying themselves. If Ashton got her a gift, he gave it to her in private.”

Aw! Ashton "was totally doting" on Mila during an ice cream date — "rubbing her belly and opening the door for her": http://t.co/30ufKCkBJS

— Us Weekly (@usweekly) August 16, 2014

The couple are always very coy about details of their relationship and growing family. In February, the world learned the That 70s Show alums were engaged, immediately followed by the good news that they were expecting their first child together. However, Kunis‘ due date remains a mystery. On The Ellen DeGeneres Show, she announced her due date as “sometime this year.”

Anyone else notice the adorable couple are always eating?

The name that Mila Kunis and Ashton Kutcher are considering for their baby is a family name: http://t.co/plY4cP9p47 pic.twitter.com/erHuM8dBkS

— StyleList (@StyleList) July 30, 2014

Your first look at Mila Kunis and Ashton Kutcher together on #TwoandaHalfMen http://t.co/uM9t1r5Kv8 pic.twitter.com/lEPE2r2noK

— Yahoo Celebrity (@YahooCelebrity) March 24, 2014

Bump watch! Mila Kunis looks radiant as she grabs a burger with @aplusk http://t.co/uOAYMqwIKO pic.twitter.com/mR6rKFxsOn

— E! Online UK (@EOnlineUK) July 17, 2014

Ashton Kutcher steals a kiss from Mila Kunis on their fro-yo date http://t.co/NxGKiyrIeT pic.twitter.com/eRduxf6CUg

— Daily Mail Celebrity (@DailyMailCeleb) June 9, 2014

Meanwhile, Kunis did spill, in graphic detail thank you very much, about the birth plan to Marie Claire in the July 2014 issue.

“Two people are allowed in my delivery room: my doctor and my significant other,” she said. “And [my future husband] is staying above the action. He’ll be head to head. Not head to vag. Unless he wants to risk his life and see. But I wouldn’t if I were him.

“I highly doubt he wants to see that being ripped apart and shredded,” she added. “Because it will be shredded. It’s just a matter of how badly.”

Ew!

Image via Wikimedia Commons