Vincent Kompany celebrated Manchester City's unexpected early title win alongside a Manchester United fan - wife Carla Higgs's father.
Kompany watched United lose 1-0 to bottom of the table West Bromwich Albion at Old Trafford.
The result meant City became Premier League champions for the third time in the last seven seasons.
As full-time arrived City's Twitter account broadcast a live video of Kompany celebrating - and hugging Carla's dad who is seen wearing a United shirt.