John Krasinski and Jenna Fischer have been having a great time of it recently trolling each other over the Stanley Cup (America's national ice hockey championship). They both support opposing teams and have been winding each other up about it no end.

Krasinski and Fischer, who played one of TV's all-time favourite couples Jim and Pam in 'The US Office', each had their hometowns competing in the championship. Fischer has been cheering on St. Louis Blues, while Krasinski has been rooting for his hometown Boston Bruin. He was at the final game of the series on Wednesday and brought a friend along too who fans of 'The US Office' will recognise as Pam's ex Roy (David Denman).

In the video, Krasinski says, "Jenna Fischer, I know we've been having our ups and downs recently. I just wanted to say, I'm really sorry you're not here. This is your seat right here, and I was really bummed that you couldn't make it. But listen, honestly? Let's just have the best team win."

Fischer then retweeted the video with this excellent comeback referring to 'The US Office'.

It was Fischer who had the last laugh though as her team went on to win the game and the championship after a 52-year-wait. Eh.. go Blues!