Arnold Schwarzenegger and Maria Shriver have come together to celebrate the birthday of their eldest child Katherine.

The friendly exes reunited to spend some family time in honour of their daughter’s 27th birthday on Tuesday. Katherine shared the happy snap on Instagram which shows Arnold, Maria and two of their young children, 25 year old Christina and 23 year old Patrick. Their 19 year old son Patrick was missing from the get together but got a little shout out in the caption:

“This is 27!” Katherine wrote. “Thank you to my amazing family and my fabulous friends for making this birthday one for the books! Christopher you were missed. 27 is going to be my best year yet!”

This is 27! Thank you to my amazing family and my fabulous friends for making this birthday one for the books! Christopher you were missed ? 27 is going to be my best year yet! ????

A photo posted by Katherine Schwarzenegger (@katherineschwarzenegger) on Dec 13, 2016 at 10:31pm PST

Arnold and Maria divorced in 2011 after 25 years of marriage. The reason behind the split was the revelation that Arnold had been having a long term affair with the couple’s housekeeper Mildred Baena. Their union resulted in the birth of a son, Joseph now 14 years old.

“This was without a doubt the biggest setback and the biggest failure in my life,” Arnold says about the break up of his marriage. “Not only failure, but you really feel like, ‘I’m to blame for it. It was me that screwed up,’ and you can’t point the finger at anyone else.”

Despite the divorce, the former couple are making a conscious effort to always attend important events together for their children.

Photos: Instagram