"All good things have to come to an end. I will always love Victoria and never tell her secret. It's been an absolute amazing time!" the model said in a statement.
The German beauty had been a Victoria's Secret Angel since 1999, shortly after rising to fame stateside with her Sports Illustrated shoots and numerous magazine covers. She hosted the 2002, 2006, 2007 and 2009 editions of the Victoria's Secret Fashion Show.
"Heidi will always be an Angel," Ed Razek, president and chief marketing officer of Victoria's Secret parent company, said.