Article continues below advertisementJoe Manganiello and Caitlin O'Connor are engaged!The lovebirds "are excited for this next chapter in their lives" as they plan to marry, a source told TMZ on Friday, October 17.Manganiello reportedly confirmed the news during his speech at the San Diego Film Festival on Thursday night, October 16, when he referred to O'Connor as his "fiancée" and thanked her for supporting him as he accepted his Career Spotlight award.