He's practically a regular on Ellen, so it's time he finally shared the job with her! ROB LOWE serves as special guest and co-host for the day! In honor of his 50th birthday, Ellen welcomes her friend, neighbor and fun accomplice back to celebrate their memories, and make some new ones! The actor has been catching eyes and showing off his talents on the screen since the '80s, and now he has a new book out called "Love Life," in which he tells the behind-the-scenes stories of his life and loves. As Ellen and Rob love each other so much, he'll be sharing even more when he stops by again! Then, the star of one of Ellen's favorite television dramas is here to talk about the madness that has spread over "Scandal." GUILLERMO DIAZ drops in! He's killed, chased, and haunted viewers as his character Huck, but in real life, the actor couldn't be nicer. Ellen and Guillermo will lighten it up when they break down the latest on TV's biggest thriller! On Wednesday, Ellen's toasting her friends! (thetvdb.com)