According to a report in Us Weekly magazine, the 42-year-old dad-to-be is supporting wife Beyoncé by dieting with her.
A source told new Us Weekly that the delighted soon to be parents are maintaining a ‘partially vegan diet’.
The source added: “Jay’s trying to be disciplined and he needs the energy to support her.”
And Beyoncé, 30, isn't going to let herself go just because she’s expecting!
She recently told US TV show 20/20: “I’ve been really conscious about food.
“I’ve been trying my best not to lose control!”
And the couple’s commitment to healthy living seems to be paying off.
A source tells Us that earlier this week the duo were ‘dancing up a storm’ at Hollywood’s Spare Room club.
The source added: “They were loved up and sweet together and partied until 4am!”