Robert De Niro Wishes Zac Efron's Girlfriend Sami Miro a 'Happy Birthday' in Hilarious Funny or Die Video!
Zac Efron tries to get Robert De Niro to smile in this new Funny or Die video.
The 28-year-old actor asks his Dirty Grandpa co-star to wish his girlfriend Sami Miro a happy birthday.
PHOTOS: Check out the latest pics of Zac Efron
When a simple “happy birthday” doesn’t satisfy Zac, he asks Bob to hold balloons, sing, and give more energy.
It doesn’t go so well. Watch Bob tell them off in the video below!
“Oh my God, you better love that,” Zac tells her.
Zac Efron & Robert De Niro – Funny or Die Video