She was discovered by an agent at John Casablancas Agency as a young teen, and eventually catapulted her success by starring in the GUESS by Marciano campaign of Spring/Summer 2009, with photographer Matthias Vreins-McGrath. Emily has also been featured in top campaigns for Maybelline, Calvin Klein, Missoni, Longchamp and Gap. Didonato is highly-desired model on the runway as well, walking for high-fashion designers like Chanel, Balmain, Louis Vuitton and many more.