It's a Wonderful World (1939)

Academy Award winners Jimmy Stewart and Claudette Colbert star in a screwball comedy about a rookie private detective trying to clear both his client and himself. When Guy Johnson (Stewart) discovers his footloose, playboy millionaire client, Willie Heyward (Ernest Truex), holding a smoking gun over the lifeless body of Heyward's girlfriend, Johnson knows he's going to use every trick he knows--and many he doesn't know yet--to prove Heyward's innocence. But Johnson has no idea that his quest will require him to escape from prison, abduct a famous poet (Colbert)...and fall in love.