Rick Ross put out a remix of the 50 Cent song with his own lyrics over the beat on the mixtape "#RenzelRemixes," released in November, which was meant to promote his recent "Black Market" album, according to the lawsuit.
50 Cent's publicist sent a statement to Billboard saying it was a matter of protecting the artist's reputation.
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50 Cent through the years
50 Cent slams Rick Ross with a $2 million lawsuit accusing him of stealing 'In Da Club'
Rapper Curtis Jackson aka '50 Cent Rapper' in front of HUMVEE outside Stage 17 at Raleigh Studios in Manhattan Beach where he is shooting music video for Emimem's new label on 12/10/2002. (Photo by Bob Chamberlin/Los Angeles Times via Getty Images)
Actor/Singer Curtis '50 Cent' Jackson arrives at the Premiere Of 'Get Rich Or Die Tryin'' at Grauman's Chinese Theater on November 2, 2005 in Hollywood, California. (Photo by Kevin Winter/Getty Images)
US musician and actor Curtis Jackson also known as 50 Cent performs in Boris Trajkovski hall in Skopje late on March 31, 2010. (Photo by Robert Atanasovski, AFP/Getty Images)
Curtis '50 Cent' Jackson attends 'Escape Plan' New York Premiere at Regal E-Walk on October 15, 2013 in New York City. (Photo by Dave Kotinsky/Getty Images)
Recording artist Curtis '50 Cent' Jackson of the music group G-Unit performs onstage during the 2014 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 20, 2014 in Las Vegas, Nevada. (Photo by Kevin Winter/Getty Images for iHeartMedia)
NEW YORK, NY - JULY 24: Rapper/actor Curtis James Jackson III aka 50 Cent On ABC's 'Good Morning America' at Rumsey Playfield, Central Park on July 24, 2015 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
NEW YORK, NY - SEPTEMBER 10: Curtis '50 Cent' Jackson attends Tuesday's Children Roots of Resilience Gala 2015 on September 10, 2015 in New York City. (Photo by Paul Morigi/Getty Images for Tuesday's Children)
NEW YORK, NY - SEPTEMBER 11: Curtis '50 Cent' Jackson attends the annual Charity Day hosted by Cantor Fitzgerald and BGC at Cantor Fitzgerald on September 11, 2015 in New York City. (Photo by Noam Galai/Getty Images for Cantor Fitzgerald)
NEW YORK, NY - SEPTEMBER 30: Rapper Curtis '50 Cent' Jackson III attends JCPenney and Michael Strahan's launch of Collection by Michael Strahan on September 30, 2015 in New York City. (Photo by Bryan Bedder/Getty Images for JCPenney)
LAS VEGAS, NV - OCTOBER 10: Rapper Curtis '50 Cent' Jackson performs at the 10th annual Wine Amplified festival at the Las Vegas Village on October 10, 2015 in Las Vegas, Nevada. (Photo by David Becker/WireImage)
Curtis '50 Cent' Jackson arrives at The Paley Center For Media's Hollywood Tribute to African American Achievements in Television on October 26, 2015 in Beverly Hills, California. AFP PHOTO / FREDERIC J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
ATLANTIC CITY, NJ - OCTOBER 31: 50 Cent attends at The Pool After Dark at Harrah's Resort on October 31, 2015 in Atlantic City, New Jersey. (Photo by Shareif Ziyadat/Getty Images)
GLASGOW, SCOTLAND - NOVEMBER 04: 50 Cent performs at The SSE Hydro on November 4, 2015 in Glasgow, Scotland. (Photo by Ross Gilmore/Redferns)
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"Our complaint alleges that Rick Ross has taken [50 Cent's name and reputation] without permission to advertise his own album, and violated 50 Cent's rights in the process, and we believe he should be held liable," the statement said.
50 Cent and Rick Ross have feuded before, with 50 Cent paying $7 million for leaking a sex tape said to feature the mother of Rick Ross' child.