Jackson and Seacrest have worked together on the Fox singing competition since its debut season in 2002. However, rumours about Seacrest's future with the show have been swirling following claims that he is in the running to replace Matt Lauer on Today.
During an appearance on Jimmy Kimmel Live, judge Jackson said: "[Ryan] is the best at what he does. A lot of people host these shows and it is hard [but] you never see him sweat. He never panics."
As for rumours about Seacrest's future, Jackson said: "Listen, he's definitely there this season. I hope he sticks around next season. I couldn't even imagine doing the show without him. No-one does it better. The show runs because he helps run it."
Seacrest recently told reporters at the Television Critics' Association tour that he "couldn't imagine" his life without American Idol, while Fox executive Mike Darnell said: "We love Ryan. I can't imagine the show without him.
"He's an enormous part of the show - our expectation is he's going to be on the show as long as we can get him."
American Idol returns for its 11th season with a two-night premiere featuring audition highlights from Savannah and Pittsburgh on Wednesday, January 18 and Thursday, January 19 at 8/7c on Fox.
> American Idol judges: 'There are a lot of frontrunners this season'
> Read Digital Spy's full American Idol headlines
Watch Randy Jackson talking to Jimmy Kimmel below: