\"Happy birthday to the sweetest father and friend❤️we love you, cajm,\" she wrote, referring to her former partner using his initials.

Paltrow, 50, and Martin share two children, daughter Apple, 18, and son Moses, 16.

A day prior, Paltrow celebrated her current husband Brad Falchuck's birthday, sharing a snapshot of him on her Instagram account. In the photo, Falchuck, 52, whom Paltrow married in September 2018, flashes a huge smile while looking away from the camera.

\"He won't see this as he's not on social (another reason why he's so cool),\" she captioned the post on Wednesday. \"But let's all wish him a happy birthday, anyway💙.\"

View this post on Instagram

A post shared by Gwyneth Paltrow (@gwynethpaltrow)

Paltrow and Martin, who tied the knot in 2003, parted ways after 10 years of marriage in 2014. The two famously announced their separation on her Goop blog in a post titled \"Conscious Uncoupling.\" Their divorce was finalized in 2016.

Speaking to the Evening Standard in 2019, Paltrow opened up about her prior relationship with Martin. Calling her ex \"a very close friend,\" she told the outlet, \"I think we've managed to really stay [as] a family.\"

\"I see him every day, I talk to him every day,\" she said. \"And it was very difficult, but I think you see in the children that they got through it, so I am proud of us, I really am. We kept to our commitment that we would put the children first.\"

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