Jack Russell Terrier Pictures

Jack Russell Terrier Cosmo lit up the screen in his new film Beginners alongside actors Ewan McGregor and Mélanie Laurent. Ewan developed such a close bond with his cute little costar that he wanted to take him home after filming! Cosmo's breakout performance has inspired us to share some Jack Russell Terrier love.

Jack Russell Terriers are an amazing breed with tons of energy. Their origins in fox hunting provided them with strong instincts and lots of intelligence. They are definitely lively and loving little guys. In honor of Cosmo, here are some shots of Jack Russells, both purebred and adorably mixed, having an absolute blast.