‘American Idol’ Exec Says ‘Legend’ Steven Tyler Will Be Good TV

'You never know what he's going to say. That, as a TV producer, you're interested in,' Nigel Lythgoe tells MTV News.

One thing that fans of “American Idol” can count on each season is a level of unpredictability, particularly once the show narrows the contestants down to 20 and the performance rounds and weekly eliminations begin. This season has upped the unpredictability factor in the form of new and potentially wayward, wacky judge Steven Tyler.

When MTV News caught up with the reality show’s returning executive producer Nigel Lythgoe , we asked if he was worried about having to censor the Aerosmith frontman.

“Oh yes, [I have] every worry about that,” Lythgoe readily admitted about Tyler’s sometimes-potty mouth. “But we’re on a delay, and he’s already done it. And then he forgets that he’s not allowed to say it, so he’ll say, ‘F—! Did I say f—? Oh f—. Sorry mate.’ ”

Lythgoe — who also appears as a judge on Fox’s other reality talent show, “So You Think You Can Dance”— has said that a large part of Tyler’s appeal is not being able to predict what he’ll say or do.

“He has come through that whole rock and roll circus,” said Lythgoe of Tyler , whom he also hopes will perform on the show, along with judges Jennifer Lopez and Randy Jackson, at some point. “Why wouldn’t you want a legend there? You never know what he’s going to say. That, as a TV producer, you’re interested in.”

As for 62-year-old rock icon Tyler , he seemed genuinely excited about the entire process but with one concern as the show prepares for its season 10 kickoff.

“The part that’s a little difficult is judging young kids,” he said this week. “It took me a couple minutes to get into the role of that, but I’ve grown accustomed to it and it’s fun and I get to sit next to J.Lo and Randy taking [the] you-know-what out of everybody.”

Don’t miss our “American Idol” live stream “Judging the Judges: An ‘Idol’ Without Simon,” featuring post-show analysis from Jim Cantiello and special guests, on MTV.com tonight at 10 p.m. ET. Tweet your “Idol” commentary with the hashtag #idolwithoutsimon and we could quote you on the show!

Get your “Idol” fix on MTV News’ “American Idol” page , where you’ll find all the latest news, interviews and opinions.