For years now I've been having a hard time finding the address of Katharine Houghton, niece of Katharine Hepburn and star of Guess Who's Coming to Dinner? among some other great work. I really wanted to have her autograph for my collection, so I began to start looking online for an address and found a partial one which I will post below. The only thing that I'm missing is the number, but I know that there are four numbers in the address, which I've replaced with asterisks:

Katharine Houghton
**** Lookout Mountain Ave
Los Angeles, CA 90046

I know this is a long shot, but if anyone can help me find the number I'd really appreciate it, especially someone who might have used an address for her and received her autograph TTM. I would still be deeply grateful even if anyone can share an address that's different than this one! I'm just looking for anything that works at this point!