Sophia Laura Maria Thiel (born 13 March 1995 in Rosenheim, Bavaria)[3] is a German female bodybuilder and fitness blogger.

From 2017 to 2019, she coached the online contestants on The Biggest Loser Germany[5] and from 2017 to 2019, she appeared in the German docu-soap Fitness Diaries [de].

[6] Under the brand name "Sophia Thiel", she created a fragrance line, fitness fashion collection, guidebooks and cookbooks.

[11] In April 2021, she spoke for the first time on her YouTube channel about her eating disorder bulimia nervosa and promoted her newly published book dealing with it.

As of 7 March 2022 the fitness blogger had overcome her eating disorder and appeared to be in good health.