April is packed with celebrity birthdays, with stars Robert Downey Jr. and Russell Crowe reaching milestones.<br/> <br />Oscar nominated actor Michael Fassbender, for "12 Years a Slave," turns 37 on April 2nd.<br/> <br />"Iron Man" star Downey Jr. turns 49 on April 4th.<br/> <br />Grammy-winning and Oscar-nominated R&B singer Pharrell Williams turns 41 on April 5th.<br/> <br />Oscar-winning actor and star of "Noah" Crowe turns the big 5-0 on April 7th.<br/> <br />Playboy magazine founder Hugh Hefner turns 88 on April 9th.<br/> <br />On April 15, "Harry Potter" star Emma Watson turns the ripe old age of 24.<br/> <br />Former Spice Girl-turned fashion designer Victoria Beckham turns 40 on April 17th.<br/> <br />And on April 28, Oscar-winner Penelope Cruz also turns 40.
