Royally Ever After (9 p.m., Hallmark) — In this new movie, a teacher learns that her boyfriend is actually the prince of a small country called St. Ives. If she wants to be his wife, she'll have to prove she is princess material.
Also on . . .
Royal Wedding Coverage — Most of the coverage is early in the morning, but some channels (like BBC America) will show the Prince Harry and Meghan Markle wedding highlights on a loop all day. Check out our comprehensive Royal Wedding viewing guide for details.
Patrick Melrose (9 p.m., Showtime) — The painful second episode is almost entirely a flashback to Patrick's childhood and the traumas inflicted on him by his abusive father. It's hard to watch, but explains everything about Patrick's destructive behavior later in life.
Saturday Night Live (11:30 p.m., NBC) — Tina Fey hosts the Season 43 finale, and Nicki Minaj performs.