So, this the Alphabet Celebrity Challenge (A-Z) inspired によって Liana!
Now I'm not that into modern セレブ so a lot of these will be セレブ from the classic film era (that's what I grew up with) Rules: same as Liana's: no もっと見る than 5 per letter and あなた can skip letters. :)
So, let's how far I go!

A-Anthony Perkins, Andy Griffith, Audrey Hepburn

B-Buster Keaton, Billie Holiday (yes, she did a movie) Beatles (they count), Bette Davis, Benedict Cumberbatch

C-Cary Grant, Clara Bow

D-David Tennant, Dean Martin

E-Elizabeth Taylor

F-Frank Sinatra

G-Gene Kelly, Grace Kelly, Greta Garbo, Gregory Peck

H-Harold Lloyd

I-Ingrid Bergman

J-James Cagney, Jimmy Stewart, Jack Lemon, Joan Crawford, Jean Harlow

K-Kim Novak

L-Lauren Bacall, Lucille Ball, Lana Turner

M-Marilyn Monroe, Marx Brothers

N-Natalie Wood

O-

P-

Q-

R- Rosalind Russell, Rudolph Valentino, ラット Pack, Roddy McDowall

S-Sammy Davis J.R, Sydney Poitier

T-Tony Curtis

U-

V-Vera Ellen, Vivien Leigh

W-

X-

Y-

Z-Zero Mostel

Almost made it! But seriously, name me one celebrity with the letter X? *lol!*
Anyway your turn! Good luck!