Louis van Amstel is ready to return to the Dancing With the Stars ballroom 20 years after its launch. "There was no hesitation participating - same as 20 years ago when I got the call," van Amstel, 53, exclusively shared with Us Weekly before the show's Tuesday, November 11, 20th Birthday Party episode. "Without hesitation, I said, 'Yes, I'm interested.' And that's how I became the first pro to join Dancing With the Stars season 1." In 2005, van Amstel took a risk when he agreed to help launch a new kind of reality show that paired celebrities with professional dancers.