Len Goodman has revealed he has to be "more grumpy" on the US version of Strictly Come Dancing.
The dance expert is a judge on Dancing With The Stars alongside fellow Strictly panellist Bruno Tonioli.
He told The Sun: "In America, Bruno Tonioli and Carrie Ann Inaba (US judge) are more easy going so I have to become more grumpy."
Len, 68, also confessed he has never felt more fit.
"As you get older things conk out. It's a bit like a car. As long as it's something the mechanics can fix, you can chug on for a few more thousand miles," he added.