Gwyneth Paltrow has a lot of love for Pisces men.

On Thursday, the 44-year-old actress posted a family photo to Instagram in celebration of her ex-husband, Chris Martin, turning 40.

"HAPPY 40th BIRTHDAY to the best daddy in the world!!! We ?you so much!" Paltrow captioned a pic of herself and Martin posing with their 12-year-old daughter, Apple, and 10-year-old son, Moses.

WATCH: Gwyneth Paltrow Put Her ‘S**t Aside’ During Chris Martin Split, Says They 'Still Love Each Other'

Turns out, the birthday of Paltrow's boyfriend, Brad Falchuk, was the day before. The TV producer -- who also has two kids from another marriage -- turned 46 on Wednesday and, just like she did for Martin, Paltrow shared a selfie to celebrate. "Happy birthday, handsome," she captioned the image.

Paltrow and Martin seem to have figured out the secret to co-parenting amicably after divorce. This past year, the Oscar winner sat down with ET to talk about how she's managed to maintain a friendly relationship with Martin.

"You have to constantly let go," she admitted. "You have to let go of old ideas, old resentments. You have to put the kids first, which I think people have the idea of that, but then oftentimes, you struggle with it."

WATCH: Gwyneth Paltrow Says Ex-Husband Chris Martin 'Would Take a Bullet' for Her