The newly appointed host believes his extroverted personality complements his straight-talking co-hosts' and claims the pair don't even have to try to make it look natural for the cameras.
Mario said: ''It's been great since you can't manufacture chemistry. You either have it or you don't. It makes it easy and comfortable.
''I think I'm pretty hyper and like to talk. Our personalities mesh well and compliment each other.''
The former 'Saved By The Bell' star admits he is still getting used to the coveted gig - which he and Khloe are taking over from Steve Jones - but filming is so convenient that the transition has been very smooth.
Mario enthused to Parade.com: ''It's still pretty new. We'll have the next live show on Thursday (01.10.12). I'm excited to be kicking it off and be part of the team.
''I was already a fan of the show so I'm looking forward to it and everything is convenient: they shoot next door to where I do 'Extra' and my radio show.''