A hands-on producer and production manager, Allegra Clegg was a co-producer and key member of the producing team on the first three installments of the successful franchise, Transformers that garnered over $700 million worldwide and became the highest selling DVD of 2007; Transformers: Revenge of the Fallen that earned global receipts over $836 million; and the fifth highest grossing film of all time at more than $1.12 billion, Transformers: Dark of the Moon. Clegg also co-produced Hancock with Ian Bryce and is working with director Michael Bay on the fourth and newest incarnation of the series, starring Mark Wahlberg.
Most recently she produced the supernatural thriller, Paranormal Activity 4, starring Katie Featherston and directed by Henry Joost and Ariel Schulman. Clegg has produced many films for Revolution Studios, among them America’s Sweethearts, 13 Going on 30, and Christmas with the Kranks.

While at the studio, she also produced three films for Happy Madison, including Anger Management, Master of Disguise and The Benchwarmers. Prior to her tenure at Revolution Studios, Clegg worked on such films as Galaxy Quest, The American President, and City of Angels. 

Clegg is also the President of the Board of Directors of Westside Ballet of Santa  Monica and recently assumed Directorship of Westside School of Ballet, founded by her late mother, prima ballerina Yvonne Mounsey, who danced with the New York City and Johannesburg City Ballet companies. ​​​