Clint Meets Captain Kirk
|Clint Eastwood with Leonard Nimoy and William Shatner (with back to camera).|
This meeting is said to have occurred on the set of "Star Trek: The Motion Picture" (1979) when Clint was a well-established superstar. So, there is a connection, and you're looking at it.
Clint starred in "Escape From Alcatraz" in 1979.
As to the children, in 1979 Clint Eastwood had three children (that are known about): Kimber (born in 1964), Kyle (born in 1968), and Alison (born in 1972). The girl looks young enough to be Alison, and Kimber wasn't known about at the time, so that is probably Clint with his two children Kyle and Alison.