Are There Any Anime Adaptations Of Sleeping Princes?

I get asked about fairy-tale flips a lot, and my instinct is to separate two questions here: are you looking for anime that adapt the classic 'Sleeping Beauty' story, or anime that feature princes who are literally asleep? For adaptations of 'Sleeping Beauty', older Japanese anthology series have tackled the tale — studios that produced children’s fairy-tale collections in the 70s–90s frequently included that story. Those are the closest thing to anime adaptations of the classic sleepy royal narrative.
If you specifically want male royals under a sleeping curse, that’s a smaller niche. Anime tends to mirror the original fairy-tale gender roles more often (so princesses sleep, princes wake them), but the gender-flip appears in modern manga, light novels, and especially otome games where the “brooding, distant guy who wakes up” or “cursed prince” archetype is common. Also check web manga and doujin spaces — creators love subverting 'Sleeping Beauty' and will sometimes cast the prince as the one needing rescue. I’d recommend searching Japanese keywords like '眠れる王子' (nemureru ouji) if you read Japanese, or digging through otome and visual-novel communities for specific titles. If you want, I can hunt up concrete manga or games that do the male-sleep-curse trope next.

I might be the kind of person who notices small tropes everywhere, so here’s a quick, casual take: no, there isn’t a well-known mainstream anime simply called 'Sleeping Princes' that I can point to, but sleep-and-royalty shows do exist in related ways. The most famous recent title with 'sleep' and royalty vibes is 'Sleepy Princess in the Demon Castle' (which is delightfully silly and about a princess who loves sleeping), while true adaptations of 'Sleeping Beauty' show up in older fairy-tale anime anthologies. For an actual prince-as-victim angle, look to manga, light novels, and especially otome games — creators there flip gender roles and hand out cursed-sleep plots to male characters more often. If you want links or specific recs from any of those corners (old anthologies, otome games, or indie manga), say which lane you prefer and I’ll dig in.

Funny thing — the phrase 'sleeping princes' sent my brain down two different rabbit holes at once. If you mean an actual anime literally called something like 'Sleeping Princes', I don’t know of any major TV or film adaptation with that exact title. That said, if you mean the trope of royals asleep because of curses, dreams, or weird magic, anime and Japanese adaptations definitely play with similar ideas, though they more commonly center on a sleeping princess rather than princes. The clearest, most playful anime that leans into the whole ‘sleep’ vibe is 'Sleepy Princess in the Demon Castle' — it’s about a princess whose entire mission in a demon castle is to find comfortable places to nap, and the show leans comedic and slice-of-life rather than romantic fairy-tale revival.
On the other hand, classic fairy tales like 'Sleeping Beauty' have turned up in Japanese anthology series and children's anime over the years — things like episodes in older fairy-tale collections (often translated as 'Grimm's Fairy Tale Classics' or various 'world fairy tale' anthologies) adapt that tale in a straightforward way. If you’re chasing a prince-as-victim version specifically, you’ll find it much more in manga, light novels, or otome games where authors flip genders or hand out cursed-sleep plotlines to male characters. So, short take: no big mainstream anime titled 'Sleeping Princes' that I know of, but plenty of sleep-related royal stories across anime, anthologies, and game/manga side-materials. If you want, tell me whether you meant a title, a trope, or something from a game — I can point you at closer matches.