WATCH: Manly in full voice after silencing Roosters

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Manly Sea Eagles were on song on and off the pitch as they ended Sydney Roosters' unbeaten start to the NRL season on Friday to begin the weekend on a high note.

Dylan Walker scored his second try of the game just a minute from time at Allianz Stadium and expertly converted to seal an 18-12 victory.

Trent Barrett's side have now won three games in a row and sit fourth in the ladder and they were unsurprisingly in high spirits after ruffling the Roosters' feathers.

They put in a huge effort to down the 2013 premiers and were not holding back in the changing room as they raised the roof with an exuberant rendition of the team song.

"We are the Manly Boys, we had a win today, we are the boys you know of, we showed them how to play....." was belted out at full blast, not that the Roosters would have needed a reminder.

St George Illawarra Dragons might want to pack some earplugs for their trip to Manly next weekend.