The tournament, one of the LPGA Tour's four majors, will be played at Royal Lytham & St. Annes from July 31-Aug. 3.
Sorenstam has won 45 tournaments in her career, including three this year. Last month she competed in the Colonial on the PGA Tour but failed to make the cut.
Pak is third in money winnings this year on the LPGA Tour. Webb won the Women's British Open last year.
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