The former England striker played, and scored, for a Man Utd side against Celtic in a fundraising fixture at Old Trafford.
Before kick-off, though, Rooney discussed his love for Celtic and was even gifted a shirt with his name and number printed on the back.
Upon receiving the personalised Celtic kit, Rooney joked: “I’m not sure whether that will fit me now!
“Thank you very much for that, I appreciate it. I will put this up in my house.”
Rooney has previously admitted he wished he could have played for Celtic during his career.
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And he conceded a transfer move just “never worked out” during his playing career as he reflected on going up against Celtic for Man Utd.
“Celtic have always been a team I have followed and always wanted them to win,” he said.
“Unfortunately, I didn’t get the opportunity [to play for Celtic]I would have liked to at some point to try and play for Celtic.
“I didn’t have that chance, it didn’t work out.”
“I think they were always special games [against Celtic]. All the Celtic fans travel in their numbers.
“To go there to Celtic and experience that atmosphere and that Champions League night was special.
“It’s always special playing against Celtic.”