Ken Marino and Ryan Hansen‘s little bromance is about to encounter a big rough patch.

The real-life pals and frequent co-stars (Party Down, Veronica Mars, Play It Again, Dick, etc.) will play potential adversaries when Hansen guest stars on Marino’s NBC comedy Marry Me, TVLine has learned exclusively.

In an episode set to shoot next week and air later this season, Hansen will portray Lee, the ex-boyfriend of Marino’s onscreen fiancé Annie (Casey Wilson).

The gig also reunites Hansen and Wilson, who, coincidentally, played love interests in a Season 2 episode of Happy Endings.

Hansen is coming off a recurring role on NBC’s now-defunct comedy Bad Judge.