Instagram | @commentsbycelebs

Jim And Roy From 'The Office' Watched The Stanley Cup Finals Together And Fans Are Losing It

Jim and Roy from The Office are trolling their ex co-star, Jenna Fischer, AKA Pam, by watching the Stanley Cup Finals together — rooting against her team of choice.

If you're a hockey fan, you're probably already buzzing from the excitement of the Stanley Cup Finals.

But if you're also a fan of The Office, then your day is about to get even more exciting.

Since "The Office" wrapped up, the cast has remained close friends.

Getty Images | Mitchell Haaseth

And like friends often do, they're trolling tf out of each other on social media.

It's a sign of true friendship.

The two teams that battled it out for the Stanley Cup this year were the Boston Bruins and the St. Louis Blues.

Coincidentally, these two teams happen to be the teams that ex-fictional-lovebirds, John Krasinkski and Jenna Fischer root for.

This led to a hilarious hockey rivalry between the two that has developed into an all-out Twitter troll-fest.

But John's latest move has been by far the most ruthless.

If you aren't familiar with how the Stanley Cup Finals work, here's a quick summary:

Instagram | @msjennafischer

Essentially, there is a bracket of teams from two divisions that play against each other until they narrow it down to the final two teams.

The final two teams — in this case, the Boston Bruins and the St. Louis Blues, play to win the best of seven games.

Instagram | @msjennafischer

You see where I'm going with this...

The first team to win four games takes home the holy grail of hockey — the Stanley Cup.

This tournament is a huge deal for hockey supporters.

But it can definitely get pretty passionate between fans, turning into a heated rivalry — like it has for John and Jenna.

John and Jenna knew right away that there was going to be a rivalry between them, the moment he found out it was down to Boston and St. Louis.

Twitter | @jennafischer

And lo and behold, there was one. A hilarious one that primarily seemed to take place on social media.

The two both attended their fair share of games throughout the series.

Instagram | @msjennafischer

Showing their unwavering support for their respective teams, and posting about it on Instagram and Twitter.

"Stanley Cup! Let’s Go Blues!! @stlouisblues @nhl Game 3," Jenna captioned this photo.

And thus, the trolling began.

Twitter | @jennafischer

Jenna shared this photoshopped photo of her and John from The Office, wearing Boston Bruins and St. Louis Blues jerseys.

How is it that they're still so adorable, even as rivals?

John posted this video, at last night's game, along with some hilarious dialogue and a surprise guest.

Instagram | @johnkrasinski

He started the video by apologizing to Jenna — saying he wished she could be seated next to him.

When suddenly, someone else hunkers down beside him.

David Denman — also from The Office. AKA Roy.

Jenna shot back, joking that he might get left behind at the game.

But even she knew this was a hilarious troll — possibly the best one yet.

Angela, from "The Office", commented — shocked to see that John had recruited David and made him apart of his Twitter-troll antics.

Instagram | johnkrasinski

But alas, the final game came to an end and Jenna's team, the St. Louis Blues, were triumphant.

John may have won the troll-battle, but Jenna won the war — since ultimately, her team won.

Fans thought that the only thing better than watching the Stanley Cup Finals was watching John and Jenna's friendly Twitter beef.

Twitter | @bindingoflogan

Even Steve Carrell was getting in on the action.

Bruins fans accepted the graciously accepted the L because John and Jenna made the whole thing worth their while.

Twitter | @beccannelbert

The Bruins may not have won, but The Office fans did.

Let us know what you thought of John and Jenna's adorable NHL rivalry!