Siobhan Rebecca Chamberlain (born 15 August 1983) is an English professional footballer who plays as a goalkeeper for FA WSL club Manchester United and the England national team.
She joined Manchester United in 2018 after playing for Liverpool. Before joining Liverpool in December 2015, she had been at Notts County on loan from Arsenal. Chamberlain previously played at the top club level for Chelsea, Fulham, Birmingham City and Bristol Academy, as well as for North American W-League club Vancouver Whitecaps. She has represented the England women's national football team on 50 occasions since her debut in 2004. This included being part of the squad at three FIFA Women's World Cups and three UEFA Women's Championships.
A childhood gymnast, Chamberlain took up goalkeeping at the age of 14 and was spotted by Chelsea. In 2003, she left Chelsea for Fulham, who had lost their professional status and Norwegian international goalkeeper Astrid Johannessen. Chamberlain played for Fulham in the UEFA Women's Cup, but moved on to Birmingham City at the end of the season. At Birmingham City Chamberlain provided competition for Jo Fletcher during the 2004–05 season. Chamberlain then played for Bristol Academy for two seasons, leaving to rejoin Chelsea in the 2007 close season. On 26 May 2010, she left Chelsea and signed for Canadian W-League Vancouver Whitecaps.