Arsenal Ladies boss Laura Harvey will leave in January to take over at American side Seattle Reign after nearly three years with the Gunners.
The 32 year old guided Arsenal to three consecutive league titles, two Continental Cups and one FA Women's Cup.
"I've had a wonderful four-and-a-half years and would like to thank everyone at the club for the fantastic support," she told the club's website.
"A special thanks must go to (general manager) Vic Akers for giving me the opportunity to manage this special club.
"It was always going to be a huge challenge taking over from such a legendary figure in the women's game but I've learnt so much from Vic and can't thank him enough for all that he's done for me."