Michael Rooker He's Mary Poppins, y'all! The iconic line from "Guardians of the Galaxy Vol. 2" has really stuck with Yondu actor Michael Rooker. After posing with Mary Poppins at Disneyland, Rooker has now revealed an epic new phone case. Shielding Rooker's iPhone from the horrific shattered screen lifestyle is none other than Mary Poppins. Rooker appeared at the Marvel Studios booth at Disney's D23 Expo over the weekend for a Q&A and signing with fans where he revealed the phone case to a crowded audience.