Brannagan has made one senior appearance for the Reds but has been in and around the first team set-up for a number of games.
Brannagan has been on the fringes of the first team this season, making one substitute appearance in the Europa League draw with Bordeaux last month.
Happy to have signed my new contract with Lfc— Cameron Brannagan (@Cameron246bran) October 26, 2015
The Liverpool Echo has reported that the deal for the under-21 captain is a long-term one, saying it will keep the 19-year-old at Anfield until 2018 after it looked as if his contract could expire at the end of the season.
It will be interesting to see how highly rated he is by new manager Jurgen Klopp, who has several options in central midfield, but the German may look to freshen up the side in the coming weeks, with a League Cup tie against Bournemouth on Wednesday a potential opportunity for the teenager to feature.
The Liverpool boss has a reputation for developing younger players and has placed his faith in Divock Origi up front as the young Belgian has started all three of Klopp's games in charge so far.
The fans who have taken to Twitter to react to the news seem to rate Brannagan highly and are delighted by the news, and feel he shouldn't have had to wait so long before a new deal was agreed. Here is a flavour of what was said:
Good news this. Cameron Brannagan is boss. Though a lot of competition for his position in 1st 11. https://t.co/v77Le6CGYJ— Taintless Red (@TaintlessRed) October 26, 2015
Good to see Cameron Brannagan signing a new contract at the club. Shouldn't have been in this situation in the first place though.— Michael Sweeting (@M_Sweeting) October 26, 2015
I'm glad Brannagan has extended his contract. Good youngster— Indigo (@IndigoLFC) October 26, 2015
Great to see Brannagan re-signed! Would love to see Sinclair get his contract sorted too. #LFC— LFC Milwaukee (@LFCMKE) October 26, 2015
Great news that Cameron Brannagan has reportedly signed a new deal with Liverpool, one of the more promising young players right now.— Steven Carson (@StefanoHairon) October 26, 2015
Brannagan is a talent, hope he will get an oppurtunity soon— Suliman Wasim (@Wasim786S) October 26, 2015