Mumford's father, a vicar, presided over the ceremony.
Mumford, 25, and Mulligan, 26, had been pen pals as kids in London, gone their separate ways and re-connected after Mulligan's relationships with Shia LaBouf and Eddie Redmayne, Eonline reported.
Mulligan won a BAFTA for her role in the 2009 film, "An Education."
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