The 20-year-old stopper is permanently based at Melwood and has been named part of a Liverpool matchday squad on five occasions since arriving from Ringmahon Rangers in 2015.
And following the example set by the current Premier League Golden Glove holder is proving to be beneficial for Kelleher.
Speaking while on international duty with the Republic of Ireland U21s, he said: "It's been very good for me.
"To be honest, in the last year I think I've improved quite a good bit in that part of the game and a lot has been down to him, just watching him and seeing what he does in certain situations in games.