Great suggestion. I don't watch the show but when I've got a name in the grid I often look for both fictional and real people as clues - didn't do so this time for some reason.
"The Warmth of Other ___" (terrific Isabel Wilkerson book about the Great Migration)
21A
"Great party"
24A
Curlers, e.g.
28A
Suffix for C2H6
29A
Plant found at water's edge, literally
32A
Dry
33A
Some endorsements
34A
Was invested
35A
Olaf's voice
36A
Pix
37A
Cellars
38A
Org. opposing speciesism
39A
App for 36 Across
40A
Home to many FCs
41A
One-time province named in honor of King Charles I
43A
Bug
45A
Set pieces?
47A
"____ Myself for Loving You" (Joan Jett and the Blackhearts)
49A
Playful (though I feel like it could mean athletic)
52A
Condition involving lots of self-inquiry?
54A
Desensitize
55A
They're sent when you're busy
56A
Lyricist Alan Jay ____ (Camelot, Paint Your Wagon, Brigadoon, My Fair Lady) and billionaire Mark ___, whose family owns the Washington Nationals
57A
Egypt's Anwar, in the New York Times (back in the day; the paper recently changed its style)
58A
____ of Paris
Verticali
1D
"I'm out of here, Niccolo"
2D
Other mujeres
3D
Italian and French, e.g.
4D
Named
5D
Long-time cricket standout ___ Karthik. Oh, ok: Right-wing polemicist/conspiracy theorist D'Souza, who has no business being in the same grid as Isabel Wilkerson but unfortunately is the best-known person with this given name.
6D
Golf coups
7D
Alum
8D
_____ beans
9D
"Dang it"
10D
They might be pushed in Hyde Park
11D
Where to find 33 Down
12D
When locals leave Paris
13D
Moines preceder
14D
Modern profession of candor
22D
Like me doing anything more complicated than changing a light bulb
23D
Actress Thompson (on reflection, her name is a real plus)
25D
"The ___ Queen of Minnesota" (wonderful novel by J. Ryan Stradal)
26D
Lyre-bearing muse
27D
___ wave
29D
Rogue
30D
Golf coup
31D
Italian and French, e.g.
33D
First "Eight-Thousander" to fall
36D
Cush spot
38D
"____ in A Minor for Solo Flute" (J.S. Bach)
41D
Quit
42D
One in a decreasing position?
44D
Prefix with "Flu" in a medicine and "Band" in rehabilitation equipment