Sam Waterston's Role at Olivia Munn & John Mulaney's Wedding Revealed 11.07.2024 02:59 E! Online (UK) Olivia Munn and John Mulaney's wedding had an extra special dun dun. Turns out, the couple's nuptials were officiated by none other than Law & Order alum Sam Waterston, who costarred with Olivia...