Sunderland have signed forward Aiden O'Brien after the 26-year-old left Millwall earlier this summer and many fans of the south London club have taken to Twitter to voice their thoughts on the move.

O'Brien left the club at the end of June after the expiration of his contract, having made 226 appearances and scored 44 goals in nine years with the Lions.

During that period, the Irishman helped Millwall secure promotion to the Championship – a feat he'll be hoping to repeat with his new club.

Sunderland announced yesterday that the 26-year-old had become Phil Parkinson's first signing of the summer window and had joined on a two-year deal.

Speaking to the North East club's website, O'Brien said: "It feels terrific to be a Sunderland player. This is a massive club and I just can’t wait to get going. I love scoring goals, it’s what I live for and hopefully, I can bring plenty to the team."

Parkinson noted that he was "really pleased" with the signing, adding that he feels the Republic of Ireland international will bring some real versatility in the final third.

O'Brien had been a first-team regular at the Den over the last three or four seasons but saw his opportunities reduced in the 2019/20 campaign – featuring just 18 times in the Championship with the majority of those coming from the bench.

Quiz: Do you remember which club Millwall signed these 15 players from?

 

He appears to remain a popular figure among fans of the south London club, however, with many taking to Twitter to voice their thoughts on his move.

Read their reaction here: