I wrote to Ms. Dawn Wells and sent the letter off on June 9th, 2014. I received a reply back on June 21st (very speedy!) I was pleased to receive a photo upon request that was signed. The address I used was as follows:
Dawn Wells
10153 1/2 Riverside Dr
Suite 680
Toluca Lake, CA 91602
USA

I sent a letter to Ms.Tina Louise and received a reply a little while later. I sent my letter June 9th and the reply came around July 25th. She sent a personal card that she had written herself. I was very pleased to see that she had taken the time to write a message to me. The address I used was: T...

I, too, am looking for Katherine MacGregor's address. Sent a letter to her, but never heard back. If anyone knows where I can write to Ms. MacGregor, it would be much appreciated. Thank you!