Gwyneth Paltrow wished ex-husband Chris Martin a happy birthday by sharing a sweet message on Instagram.

Posting a photo of her with Martin underneath a door numbered 42, Paltrow marked his 42nd birthday by captioning the image, "Happy Birthday CAJM. This is a special one. We love you so much #42"

The couple have remained close since they announced plans to "consciously uncouple" in 2013, having married in 2003, and they co-parent their children Moses and Apple.

Paltrow is now married to producer Brad Falchuk, whose birthday she celebrated the day previously by posting a photo of them together with the caption, "It's your birthday, but it's really feels like you are the gift.

"Not just to me, and to @izzyfalchuk and Brody, but to all of us who are fortunate enough to know and love you. You are my rock, my true north, my favorite person to eat with, to travel with. You are a true friend. You want only what is for the highest good.

"You always help me see what I can't. I am so happy you were born @bradfalchuk I love you so much."

The couple were married in September 2018.