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.
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Saturday Night Live (11:30 p.m., NBC) — Tina Fey hosts the Season 43 finale, and Nicki Minaj performs.