Siobhan Rebecca Chamberlain (born 15 August 1983) is an English sports pundit, commentator, and former professional footballer who last played as a goalkeeper for Manchester United.

[8] In April 2012 she was appointed as one of eight digital media ambassadors, one from each team, who wear their Twitter account name on their shirt sleeves to raise the profile of the WSL.

[9] In December 2013, Chamberlain quit Bristol Academy to sign a two-year contract with Arsenal, where she would rival the incumbent goalkeeper Emma Byrne for a starting position.

Chamberlain had played every minute of every game in her three seasons back at Bristol, but craved a new challenge: "My ambition is to be England's number one so the added competition at Arsenal is what I need at this point in my career.

"[10] On 9 July 2015, Chamberlain moved to Notts County on loan until the end of the season following injury to England teammate Carly Telford.

[11] She was ineligible for the 2015 FA Women's Cup Final and The Football Association refused Notts County's request for dispensation to sign another goalkeeper,[12] so Telford played in the team's 1–0 defeat despite a shoulder injury.

[16] She recovered in time for the start of the season and made her competitive debut for Manchester United in a 1–0 League Cup victory against Liverpool on 19 August.

[19] United clinched the Championship title on 20 April 2019 with a 7–0 win over Crystal Palace with Chamberlain having played in all 18 league matches, conceding seven goals in that time.

[31] By the 2011 World Cup American-born Karen Bardsley had taken over the England team's first-choice goalkeeping position,[32] with Brown and Chamberlain as back-ups.

In May 2015, national coach Mark Sampson named Chamberlain in his final squad for the 2015 FIFA Women's World Cup, to be hosted in Canada.

[33] On 27 June 2015, she replaced fellow goalkeeper Bardsley in the 52nd minute of England's 2–1 quarter-final win over hosts Canada, as her country reached the semi-finals of the World Cup for the first time in their history.

Bardsley had suffered a swollen eye after an allergic reaction to the rubber crumb on the controversial artificial turf pitch, but was restored to the team for England's semi-final defeat by Japan.