Elvis rarely wore denim, but 1957's Jailhouse Rock called for the prisoners to ... but apart from an occasional leather jacket, he rarely wore the material until this suit. It's so indelible ...

He didn't just break boundaries in music; he reinvented the dress code, too. Here's a look back on the King's most iconic looks.

He didn't just break boundaries in music; he reinvented the dress code, too. Here's a look back on the King's most iconic looks.

Elvis Presley performs on stage during the ''68 Comeback Special' on NBC ...