Maddison has signed for the Foxes this summer from Norwich City.
Maddison, who scored 14 goals in 44 appearances for Norwich City in the second-tier Championship last season, is in awe of the England international's relentless attitude.
“Playing with the likes of Jamie Vardy was a selling point. Playing behind him will be brilliant," Maddison told the Leicester Mercury.
“His story is phenomenal. I think everyone looking from the outside are wowed and he has been brilliant. He never gives anything up and is quality in front of goal. I can't wait to play with him."