Muhammad Ali has signed as a the new face of Under Armour.

The 73-year-old heavyweight boxing legend, who was named the “Sportsman of the Century” by Sports Illustrated, is back in the limelight again after signing a deal with Under Armour.

According to CNN Money, Under Armour announced Wednesday it will launch a “lifestyle apparel” line bearing Ali’s likeness and some of his most famous motivational phrases next month.

Dubbed “The King of Trash Talk” by ESPN columnist Ralph Wiley, it is unknown how much Muhammad Ali will make in the multi-year deal.

“Ali is one of the most recognized and celebrated figures of all time,” Under Armour noted, adding that the company will also use photos of Ali in some of its marketing campaigns.

Why Muhammad Ali is still The Greatest: http://t.co/ZMAesgmG0C pic.twitter.com/Itz5JtB40r

— British GQ (@BritishGQ) February 18, 2015

A Louisville, Kentucky native, Muhammad Ali, who was then known as Cassius Clay, began boxing when his bike was stolen.

By the time Muhammad Ali was 18 years old, he had already won an Olympic gold medal at the 1960 games. He later had a high-profile career that included a series of boxing titles, his conversion to the Nation of Islam and became a political activist.

"Float like a butterfly, sting like a bee." – "The Greatest" & "#Louisville Lip" @MuhammadAli #blackhistorymonth pic.twitter.com/RBkOIinUcG

— Visit Louisville (@gotolouisville) February 14, 2015

The boxing legend who was famous for saying “I float like a butterfly, and sting like a bee,” retired in 1981 and has been battling Parkinson’s disease ever since.

He is also the recipient of the nation’s highest civilian honor, the Presidential Medal of Freedom.