The 44-year-old actress dedicated a sweet post to her ex-husband and "best daddy in the world" on the Coldplay frontman's 40th birthday.
"HAPPY 40th BIRTHDAY to the best daddy in the world!!! We [love] you so much!" she captioned a picture on Instagram of herself with Martin, 12-year-old daughter Apple and 10-year-old son Moses.
Paltrow split from Martin in 2014 after 10 years of marriage, but has remained close friends with the singer since. She went so far as to say in the Feb. issue of InStyle that Martin "would take a bullet" for her.
"He's at my house every single day," the star told the magazine. "We have our own lives but we still have our family life."
"To this day, Chris would take a bullet for me, even though I'm not his wife," she said. "I honestly think Chris and I have contributed something positive to the culture of divorce.
"Happy birthday, handsome," she wrote.