A contemporaneous 1956 United Press feature states that Marilyn Monroe lodged at Chateau Marmont while working on Bus Stop; co-star Don Murray directly recalled her use of the Chateau during production, and multiple reputable publishers preserve the exact stay relationship.
Marilyn Monroe stayed at Chateau Marmont in Los Angeles during the 1956 production of Bus Stop. A newspaper report syndicated by United Press in the same year placed her in accommodation at the Chateau, and later independent accounts preserve the same film-and-hotel connection.
Source conclusion:
The cited sources support a stay at the named hotel.
