No. Tom Selleck was born in Detroit Michigan, January 27th 1945 and has two brothers (Robert & Daniel) and a sister (Martha).
Sam Elliott was born in Sacramento, California, August 9, 1944 and as far as I can tell has no siblings.
Asked in Supernatural (TV Series), Jensen Ackles
Is Sam from Supernatural Jensen Ackles' real brother?
The character Sam in Supernatural is related to the character Dean but the actors Jared Padalecki and Jensen Ackles are not real-life brothers. so yeah there not biologicaly related ...
Is prime related to megatron?
No. They were never brothers in the original cartoon. So there should be no reason why they're brothers in the movie. YES because after Sam killed Megaron, Prime said " you left me no choice brother " so in the movie they are related some how ...