“When the actress saw her first strands of gray hair, she thought she’d dye” is a pun that has been printed on sevveral images. A “Jumble” puzzle answer was published in many newspapers on March 15, 1965:
   
“What a girl who discovered her first few strands of gray hair thought—SHE’D DYE!”
 
The one-liner became popular again in 2000. “When an actress saw her first strands of gray hair, she thought she’d dye, (Pun of the Day)” was posted to the newsgroup alt.callahans on January 14, 2000.
   
   
15 March 1965, Atlanta (GA) Constitution, “Jumble” (puzzle), pg. 10, col. 1:
Answer! What a girl who discovered her first few strands of gray hair thought—SHE’D DYE!
 
Google Groups: alt.callahans
Puns of the Weak 1-14-00
Stan Kegel
1/16/00
(...)
When an actress saw her first strands of gray hair, she thought she’d dye. (Pun of the Day)
     
Google Groups: alt.humor.puns
“Puns of the Weak” 9/22/00
Stan Kegel
9/23/00
(...)
When she saw her first strands of gray hair, she thought she’d dye. (Very Punny)
 
23 November 2000, The Times-Transcript Moncton, New Brunswick), “oting and laughing. . . for some reason” by Norbert Cunningham:
Hear about the woman who saw her first strands of gray hair and thought she’d dye?
   
2 November 2002, Daily Press (Timmins, ON), “Puns aplenty on Internet” by Steve Elliott, [g. 21;
When the actress saw her first strands of grey hair she thought she’d dye.
 
Google Groups: alt.humor.puns
Puns of the Weak Special: 100 Top One-Liners
Stan Kegel
5/25/03
The 100 best one-liners as chosen by the readers of Mike Bull’s “Pun of the Day”

(...)
34. When an actress saw her first strands of gray hair she thought she’d dye.
 
Google Books
E-Mail Humor
By Louis G. Morton
Victoria, BC: Trafford Publishing
2005
Pg. 6:
When an actress saw her first strands of gray hair, she thought she’d dye.
 
Google Books
Playing with Words:
Humour in the English Language
BY Barry J. Blake
London: Equinox
2007
Pg. 5:
When the actress saw her first grey hairs, she thought she’d dye.
 
Twitter
Kaush‏
@by0
When an actress saw her first strands of gray hair, she thought she’d dye. #puntastic
10:47 PM - 19 Apr 2009
 
Google Books
A Man Walks Into a Bar 3
By Jonathan Swan
London: Ebury Press
2010
Pg. 1:
When an actress saw her first strands of grey hair she thought she’d dye.
 
Google Books
Once Apun A Time:
A Rich, Historical and Sometimes Earthy Collection of Puns
By Robin Leech
Victoria, BC: FriesenPress
2015
Pg, 25:
When an actress saw her first strands of gray hair, she thought she’d dye.