When the guard catches Donald again, there's a chase. Donald escapes to Mickey Rooney's dressing room. He gets The Mickster's autograph...along with some free torment!
GG is going to kiss Gable and drops him
Then Donald comes across Sonja Henie, who skates her name into ice. Donald turns red when Shirley Temple recognizes him. In a fun twist, all the stars in Hollywood are suddenly excited about getting Donald's autograph when word gets out that he's on the lot! Garbo is so anxious that she literally drops Clark Gable in the middle of a scene, pulling an autograph book out of her dress as she dashes off to find Donald.
Other Hollywood actors:
1. Clark Gable
2. The Andrew Sisters
3. Charlie McCarthy
4. Stepin Fetchit
5. Roland Young
6. The Lone Ranger, riding his horse Silver
7. Joe E. Brown
8. Martha Raye
9. Hugh Herbert
10. Irvin S. Cobb
11. Edward Arnold
12. Katharine Hepburn
13. Eddie Cantor
14. Slim Summerville
15. Lionel Barrymore
16. Bette Davis
17. Groucho Marx
18. Harpo Marx
19. Mischa Auer
20. Joan Crawford
21. Charles Boyer
Early sketches of Garbo, Donald Duck, and Clark Gable
Source: IMDB and Wikipedia