Arsenal goalkeeper Aaron Ramsdale sat with Southampton fans at Wembley to see them defeat Leeds United in Sunday's promotion playoff final.
Ramsdale took his seat in fancy dress, sporting a 'Hagrid' costume, including fake beard.
The England keeper never played for Saints nor Leeds, but former Bournemouth teammate David Brooks played for Southampton on the day.
Saints won 1-0 thanks to Adam Armstrong's goal.
For his part, Ramsdale is expected to leave Arsenal this summer after losing his place to David Raya this past season.