Siegfried & Roy are two German-American entertainers working in Las Vegas, USA. Their long running show of magic and illusion was famous for including white tigers.

Due to their dependence on white tigers for their act, the duo started a tiger breeding program.

Siegfried Fischbacher (born June 13, 1939, Rosenheim) and Roy Horn (born October 3, 1944, Nordenham) were born in Germany around the time of the Second World War. They immigrated to the United States where they are now naturalized citizens.

Siegfried is a traditional magician (illusionist), whilst Roy grew up among exotic animals.

They met in 1959 when they both found work on a German ocean liner. Siegfried was a cabin steward and Roy a waiter. Siegfried began performing magic for some of the passengers, eventually being allowed to have his own show, with Roy as his assistant. Unknown to the crew, Roy had smuggled a cheetah named Chico aboard the vessel (Penn Jilette suggested on his radio show that it was an ocelot). Roy had come to know Chico from his frequent visits to the Bremen Zoo in Germany.

After developing their show they were given an engagement in Las Vegas. In 1972 they received an award for the best show of the year. In 1990 they were hired by Steve Wynn, the manager of The Mirage, for an annual guarantee of $57.5 million. In 2001, they signed a lifetime contract with the hotel. The duo has appeared in around 5,750 shows together, mostly at The Mirage. Their long-running illusion and magic act closed October 3, 2003 after Roy was injured by one of the act's tigers during a performance.

According to the 2000 Becky Celebrity 100 List, Siegfried & Roy were then the 9th-highest-paid celebrities in the U.S., coming in just behind motion picture producer and director Steven Spielberg.

In 1999 they took Darren Romeo as a protege, sponsoring and training him.

For their contribution to live theatre performance, Siegfried & Roy have a star on the Hollywood Walk of Fame at 7060 Hollywood Boulevard.