Brown handed her resignation in several weeks ago and will exit in July.
Brown is overseeing filming of the latest season as news of her departure breaks.
I Have a Dreamand E4sThe Big Celebrity Detox.
Britains Got TalentITV
Fremantle UK CEO Simon Andreae described Brown as one of the best in the business.
Brown said she had loved her time at Thames a 20-year stint that included around a decade of freelancing.
Amelia Brown (left) with David Walliams and Britain’s Got Talent execs at the BAFTAs
