Len Goodman is known as the "Dancing With the Stars" judge who's a stickler for sticking to the rules.

So it might surprise fans of the show to know that Goodman, 68, didn't start his own dancing career until he was 20. That relatively late start didn't keep him from dominating the dance world.

Goodman, who worked as a welder before he took up dancing, won numerous competitions and awards before retiring as a professional dancer in his late 20s. In addition to being a judge on "Dancing" and on "Strictly Come Dancing"  the U.K. show that gave birth to it - Goodman owns his own dance school. He has traveled the world to judge dance competitions.

As the British celebrate their queen's Diamond Jubilee with pomp, pageantry and parties across the country, the London native shared his favorite London spots on "Good Morning America" today:

Goodman's Favorite London Locales

•  Jermyn Street, a London road that's famed for being the home to many fine menswear stores. It's where all "decent" men go to be clothed, Goodman said. "I bought my first shirt there 45 years ago. Still the same shop. Reliable. British. That's the important bit."
• Covent Garden, a London district that houses markets, restaurants, stores, theaters and the famous Royal Opera House, and restaurants including J. Sheekey, which is famous for its fish and seafood.
• The Millennium Bridge. Officially called the London Millennium footbridge, the structure spans the River Thames, from the historic St. Paul's Cathedral to the Tate Modern Gallery.