Philipp Plein is a German fashion designer and founder of the Phillip Plein International Group which includes the Philipp Plein, Plein Sport, and Billionaire Couture brands.^[2][3][4][5]

Plein was studying law when he began designing luxury dog beds.^[6] Soon his designs drew attention from experts within the interior design industry and in 1998, the company was founded in Munich, Germany.^[2]

Plein started making bags and accessories from the leftover exotic leathers, which were sold alongside his design pieces at trade fairs. In 2003 the entrepreneur was asked to design a lounge at the German trade fair CPD Düsseldorf,^[7] for Moët & Chandon, where he was also allowed to sell his accessories. The initial namesake casual fashion brand was born a year later in 2004, while the current Philipp Plein luxury ready to wear label was launched in 2008.

Plein is listed as the 275th richest individual or family in Switzerland for 2016 by the business magazine Bilanz in their annual Die 300 Reichsten (Top 300 Richest) with a net worth of 175 million CHF.^[8]

Plein's first collections were vintage military jackets which he embroidered with Swarovski skulls and sold at the Maison et Objet in Paris^[11]

In 2006 the accessories line was introduced and in 2008 the "Couture" collection was launched.^[12]

In 2008 Philipp Plein presented his "heavy metal" collection at the "Germany's Next Top Model" fashion show. In 2009 he collaborated with Mattel and presented the Philipp Plein Barbie doll during Barbie's 50th Birthday celebrations at the Nuremberg Toy Fair.^[13]

In the same year, the first store was opened in Monte Carlo, and the first commercial showroom in Milan.^[14]

In 2010 Plein boutiques opened in Vienna, Moscow, St. Tropez, Cannes, and Kitzbuhel in addition to the opening of a showroom in Düsseldorf.^[15] The spring/summer 2011 women's wear fashion show debuted at Milan fashion week in September and took place in a deconsecrated 16th century church filled with white roses, with after party DJ set by Pierre Sarkozy, who was also face of the men's spring/summer 2011 ad campaign.^[16]

Mischa Barton was chosen for the fall/winter 2010 season, while Lindsay Lohan posed for the Spring/Summer 2012 campaign.^[17] In 2011 PHILIPP PLEIN boutiques opened in Forte dei Marmi^[18] and Düsseldorf,^[19] and the Hong Kong showroom was inaugurated.^[20] The FW 2011 women's fashion show taking place in February featured a pre-show orchestra performance, this time featuring DJ set by Peaches Geldof.^[21]

In 2012, ten boutiques were opened, in Marbella, Moscow Crocus, Baku, Milan, Dubai, St. Petersburg, Seoul, Macau, Amsterdam and Berlin.^[22]

In 2012 Plein signed an agreement with the soccer team AS Roma to dress the team players starting with the 2012/13 season for 4 consecutive seasons.^[23]

In 2013 retail expansion included the opening of stores in Porto Cervo,^[24] Moscow, Paris,^[25] Miami, Casablanca, Courchevel, Kiev, Hangzhou, Seoul^[26] and New York.^[27]

2014 store openings include Hong Kong,^[28] Los Angeles and New York, Ibiza, Bodrum, Doha, and London, the first Plein duty free at Vienna airport.^[29] The men's Fall/Winter 2014 was created by fashion show producer Etienne Russo.^[30]

The men's spring summer 2015 fashion show and after party took place in an abandoned historic public swimming pool refurbished for the show.^[31]

In February 2017 the men's & women's 2017/2018 fall/winter line was shown during New York fashion week. ^[32][33]

In May 2017 Plein hosted a coed runway show to display the brand's resort 2018 collection at his villa in Cannes during the Cannes Film Festival.^[34][34]

June 2017 Plein had 3 shows for 3 separate brands in Milan Men's Fashion Week. For Philipp Plein, Plein Sport, and Billionaire Couture.^[35]

Notable celebrities that have worked with Plein include Mischa Barton, Lindsay Lohan, Snoop Dogg, Rita Ora, Naomi Campbell, Iggy Azalea, Grace Jones, Theophilus London, Fergie, Chris Brown, Jeremy Meeks, NJ Camorra and Floyd Mayweather.^{[36][37][38][39][32]}