The 16-year-old completed a move to Liverpool FC from Championship side Fulham in the 2019 summer transfer window.
Elliott is the second arrival at Liverpool FC this summer after the Merseyside outfit brought in Sepp van der Berg from FC Twolle.
The England Under-16 international made his Fulham debut aged 15 years and 174 days in the League Cup in September 2018.
Elliott has already linked up with the Liverpool squad for their friendly against Napoli in Edinburgh and the subsequent training camp in Evian.
And the new Liverpool FC signing took to Instagram to send a message to the Reds supporters following his switch to the Champions League holders.
“I am so happy to be able to announce that I have signed for @LiverpoolFC,” Elliott wrote on Instagram.
“To have joined the club that I supported as a boy is a dream come true for me and all of my family and it’s an incredible feeling to now officially be able to call myself a Red!
“I can’t wait to get started and it will be a truly special feeling to pull the famous red jersey on. I’ll work as hard as I possibly can for the club and I feel Anfield is the perfect place for me to develop and progress as a player.”
Elliott became the youngest-ever player to make his Premier League debut when he came off the bench against Wolves at the age of 16 years and 30 days.
Liverpool FC manager Jurgen Klopp has given youth a chance since taking over the reins at the Anfield outfit in October 2015.
Trent Alexander-Arnold and Joe Gomez have been able to thrive in the Liverpool FC team under the former Borussia Dortmund head coach.
The Merseyside outfit finished in second place in the Premier League table and a point adrift of champions Manchester City last term.
MORE: Man United latest news
MORE: Arsenal latest news
MORE: Chelsea latest news
MORE: Liverpool latest news