Well, this is a strange one: According to Us Weekly (but not confirmed by publicists), Carey Mulligan and Marcus Mumford, the front man for folk-rock stars Mumford & Sons, are engaged. Apparently they were “childhood pen pals†and recently reconnected at a private show from Marcus’s band. Says a source, “At the end of the night there were just the musicians, Jake [Gyllenhaal], Carey, and the Mumford boys. We had some pizza, and just played music. Jake picked up a guitar and Carey joined in on ‘Amazing Grace.’ Marcus and Carey seemed really friendly.†So friendly, in fact, that after five months, Mumford proposed. Vulture really hopes this is true, if only because then Carey Mulligan will have to go to Bonnaroo next year. [Us Weekly]