Alexey Stadler was born into a family of musicians in 1991 in St. Petersburg and studied at the Rimsky-Korsakov Musical College in his native city. In 2003 he won First Prize at the Glazunov International Competition in Paris, and has also received the National Awards for “Young Talent” (2008, 2009), “Hope of Russia” (2008), and the A. Petrov Award (2008).

In October 2008, Stadler played the Russian premiere performance of Norwegian Composer H. Sommero's "Concertino for Cello" with the Chamber Philharmonic Orchestra in the Grand Philharmonic Hall, St.Petersburg. Also in 2008, Stadler recorded Rachmaninov’s Sonata on a cello made by A. Jacout that belonged to Emperor Nicholas the Second.