Gwyneth Paltrow has nothing but love for ex-husband Chris Martin on his birthday.

The Goop founder celebrated the Coldplay lead singer in an Instagram post on Thursday that featured a selfie of the former couple together.

Happy birthday to the sweetest father and friend. We love you, cajm, she wrote, using initials to address her ex, whose full name is Christopher Anthony John Martin.

Paltrow and Martin have become popular celebrity co-parents since they announced their split in 2014 after a little over 10 years of marriage.

The couple had famously declared that they were consciously uncoupling in a statement announcing their split at the time.