Wetten, dass..? (German pronunciation: [ˈvɛtn̩ ˈdas]; German for "Wanna bet that..?") is a German-language Saturday entertainment television show. It is the largest and most successful television show in Europe. Its format was the basis for the British show You Bet! and the American show Wanna Bet?

The shows were broadcast live six to eight times a year from different cities in Germany, Austria, and Switzerland. There were also seven open-air summer shows, broadcast from Amphitheatre Xanten, Plaça de Toros de Palma de Mallorca, Disneyland Paris, Waldbühne Berlin, and Aspendos Roman Theatre. Each of the shows, which were shown without commercial interruption, was usually scheduled to last for about two to three hours, but it was not uncommon for a show to run as much as 45 minutes longer.

The game show gained great popularity in the German-speaking countries through the presenters Frank Elstner, who was also the creator, and Thomas Gottschalk in the 1980s and 1990s. After that, especially due to the takeover of Markus Lanz, the audience ratings dropped significantly, which caused the discontinuation of the show in 2014. From 2021 to 2023, Thomas Gottschalk returned for one episode each year.