Apparently last night's Sat. Night Live had a TH sketch during dress rehearsal that wasn't used in the live show. Details from Reddit, but also several tweets reporting it too.
"Tom Hiddleston Prom I liked this one a lot. Aidy Bryant and Vanessa Bayer are at their high school prom, talking about the A-list celebrities who they asked to prom and turned them down. McCarthy tells them that she asked Tom Hiddleston to prom, and he accepted. Then Hiddleston (McKinnon) came out and, despite insisting that he hated the attention that came with being famous, took over the dance floor, first performing a really bad rendition of Man in the Mirror before showing off his abs and turning his Prom King acceptance speech into a speech about the situation in South Sudan." https://www.reddit.com/r/LiveFromNewYork/comments/6b1pyq/melissa_mccarthyhaim_dress_rehearsal_recap/
A couple of the Twitter mentions: