She's one of the world's greatest actresses, multiple Academy Award winner EMMA THOMPSON is in the building! Her unforgettable roles in "Sense and Sensibility," "Love Actually," "Howards End," and the Harry Potter films prove why she's a walking master class in the art of acting. Her newest project, "Saving Mr. Banks," has critics saying she's an early frontrunner for another Oscar, and she's telling Ellen all about it! Then, music superstar and walking sex symbol LENNY KRAVITZ is swinging by to tell Ellen the scoop on his widely anticipated new film, "The Hunger Games: Catching Fire," the second installment of the record-breaking series that has the world on the edge of its seat! Next, he was just named America's Top Young Scientist 2013, and he's only 11 years old! Brilliant mind PEYTON ROBERTSON has an invention so incredible, it's set to save millions of lives. Find out what it is, today! Plus, Ellen's got special guest DJ, CARMEN ELECTRA! There's something for everyone this Tuesday on Ellen!