In Western clothing semi-formal is a grouping of dress codes, indicating the sort of clothes worn to events with a level of protocol between informal (e.g. lounge suit) and formal.^{[unreliable source?]} The term "Semi-formal" denotes black-tie for men, rather than white-tie formalwear.

The origins of semi-formal attire date back to the 1800s when Edward VII, the Prince of Wales, wanted a more comfortable dinner attire than the swallowtail coat.

In the spring of 1886, the Prince invited James Potter, a rich New Yorker, and his wife, Cora, to Sandringham House, the Prince's hunting estate in Norfolk. When Potter asked for the Prince's dinner dress code, the Prince sent him to his tailor, Henry Poole & Co., in London, where he was given a suit made to the Prince's specifications with the dinner jacket.

On returning to Tuxedo Park, New York, in 1886, Potter's dinner suit proved popular at the Tuxedo Park Club. Not long afterward, when a group of men from the club chose to wear such suits to a dinner at Delmonico's Restaurant in New York City, other diners were surprised. They were told that such clothing was popular at Tuxedo Park, so the particular cut then became known as the "Tuxedo".

Miley Ray Cyrus (born Destiny Hope Cyrus; November 23, 1992) is an American actress and pop singer-songwriter. She achieved wide fame for her role as Miley Stewart/Hannah Montana on the Disney Channel sitcom Hannah Montana.

Cyrus recorded music for the soundtracks, Hannah Montana (2006) and Hannah Montana 2/Meet Miley Cyrus (2007), released by Walt Disney Records. With the success of the Hannah Montana franchise she established herself as a teen idol. In 2007, Cyrus signed to Hollywood Records to pursue a solo career. She embarked upon the Best of Both Worlds Tour the same year, in which she performed as both herself and in character as Hannah Montana. The tour was eventually turned into a high-grossing concert film titled Hannah Montana & Miley Cyrus: Best of Both Worlds Concert (2008). In July 2008, Cyrus released her first solo album, Breakout (2008), which was commercially successful.

She began her foray into film by providing the voice of "Penny" in the animated film Bolt (2008). Cyrus earned a nomination for the Golden Globe Award for Best Original Song for her performance of Bolt's theme song, "I Thought I Lost You". She also reprised her role as Miley Stewart/Hannah Montana in Hannah Montana: The Movie (2009). The Hannah Montana: The Movie' soundtrack introduced her to new audiences within country and adult contemporary markets.