How about some old classics?
"You know how to whistle don't you, Steve? You just put your lips together and blow." Lauren Bacall to Humphrey Bogart in To Have and Have Not
"Louie, I think this is the beginning of a beautiful friendship." Humphrey Bogart to Claude Rains in Casblanca
"War, war, war. Fiddle dee dee. All this war talk's spoiling all the fun at every party this spring" Vivien Leigh in Gone With the Wind
"Would you care for a breast or a thigh?" Grace Kelly to Cary Grant (choosing chicken pieces from her picnic basket) in To Catch a Thief
"Hello Gorgeous." Barbra Streisand to her reflection in the mirror in Funny Girl
A Bit more recent: (Reserving the right to come back with some more of these

)
"At least it's a growth industry." Mitchell Ryan to John Cusack upon learning his occupation is a "professional killer" in Grosse Pointe Blank
(BTW, I loved all the quotes from the Cusack movies)
"I should not have told you that." Robbie Coltrane as Hagrid in Harry Potter and the Sorcerer's Stone
"Hey look, I'm Picasso!" Mr. Potato Head in Toy Story
Be back later
