Rachel Bilson and Blake Lively: Birthday Babes

Making for quite the special day for two of Hollywood's hottest young actresses, Rachel Bilson and Blake Lively are both celebrating their birthday today (August 25)!

While the former "OC" star happens to be ringing in her very last year in her 20's, the "Gossip Girl" actress is a bit younger as she turns 25-years-old.

Having just returned to the States following an early b-day trip to Hawaii, Rachel is coming off a year in which she got engaged before breaking up with actor Hayden Christensen.

Meanwhile, Blake continues to find success - as she starred in a new movie called "The Town" while also landing a coveted role in the upcoming film, The Green Lantern".