O'Callaghan signed the new IRFU international contract on the eve of Ireland’s clash with Samoa at the Aviva Stadium – where he will win his 65th cap.

And after pledging his future to the province, O’Callaghan, who holds four Lions caps, confessed it was a simple decision to make.

“As players we are so well looked after by both the national and provincial management teams and I feel incredibly privileged to be able to play the sport I love for both Ireland and Munster,” O'Callaghan said.

“Munster is my home province and the decision to continue my career here was an easy one when you consider the standard of players in the squad and the incredible support I have received from both the fans and my family.

“My focus now is to try and perform as well as I can to help Munster and Ireland to be successful.”