Over at The Platinum Blog Starring Jean Harlow, Lisa Burks tells the interesting story of what happened to the Grand Hotel Register, which was signed by all the guests as they arrived at the premiere for the film at Grauman's Chinese in April 1932.
Below is a page from the register, which survives in a private collection:
Guests "signed in" at the Grand Hotel, top to bottom:
Mr & Mrs Cecil B de Mille, Marlene, Rudi, Anita Loos, John Emerson (producer & husband of Anita Loos), Mr & Mrs ??? Barclay, Pat O' Brien, Jean Harlow, Paul Bern, Joan Crawford, Franchot Tone.
MGM made a promo short about the event, "Hollywood Premiere" - available on the Grand Hotel DVD, and also on youtube. Marlene only apprears briefly - this was MGM publicity, after all.