Tanya’s Score: Good-and-a-half* Rated: 14A Starring: Luke from Growing Pains, the rock star from Growing Pains, Margot Robbie Plot: A soon-to-be has-been actor (Leonard DiCaprio) and his down-and-out stunt man (Brad Pitt) strive for fame and fortune in Hollywood in 1969. Tanya’s Verdict: There’s two things you need to know about this film going in:…