Sienna Miller is turning heads opposite Ben Affleck in the Boston crime drama "Live by Night," but it's not her on-screen fashion that has turned her into Hollywood's most stylish star. Now Access Hollywood's Liz Hernandez looks back at Sienna's most iconic looks. » SUBSCRIBE: bit.ly/AHSub » Visit Our Website: www.AccessHollywood.com/ Get More Access Hollywood: Facebook: www.facebook.com/AccessHollywood Twitter: twitter.com/accesshollywood Instagram: instagram.com/accesshollywood Snapchat: OfficialAccess About Access Hollywood: "Access Hollywood" is a nationally syndicated daily entertainment news show. "Access Hollywood" delivers the most comprehensive coverage of entertainment news and personalities on television, featuring in-depth celebrity interviews and behind-the-scenes accounts of the most important events in Hollywood. Sienna Miller's Fashion Flashback! | Access Hollywood youtu.be/0Hg3p0Z3sek Access Hollywood www.youtube.com/user/AccessHollywood