Sylvester Stallone. Robert De Niro. Fight?

TheWrap reports that Stallone and De Niro could join forces for "Grudge Match," a long-gestating comedy about two retired boxing rivals who step back into the ring one last time. The site notes that while the project doesn't have a green light just yet, Warner Bros. is looking to shoot "Grudge Match" in early in 2013.

Or maybe not. Back in 2010, Stallone and De Niro were first attached to "Grudge Match," but that iteration never got off the ground.

This is a busy time for De Niro, who has taken to playing up his advancing age in recent projects: He's attached to star in "Last Vegas," an AARP-version of "The Hangover," with Michael Douglas, and has long discussed reuniting with Martin Scorsese for "The Irishman," about an aging mobster. Stallone, too, has had his fare share of age-appropriate victory laps: "Rocky Balboa," "Rambo" and "The Expendables" and its sequel, which is due out this summer.

For more on "Grudge Match," head over to TheWrap.com.

[via TheWrap]

PHOTOS: Robert De Niro And More At Tribeca

  • Emily Blunt, Jason Segel & Bill Hader

    Emily Blunt, Jason Segel, and Bill Hader attend 'The Five Year Engagement' Premiere opening night party during the 2012 Tribeca Film Festival at the MOMA on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Jane Rosenthal & Ron Meyer

    Tribeca Film Festival co-founder Jane Rosenthal and NBC Universal President-COO Ron Meyer attend 'The Five Year Engagement' Premiere opening night party during the 2012 Tribeca Film Festival at the MOMA on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Elizabeth Banks

    Elizabeth Banks attends 'The Five Year Engagement' Premiere opening night party during the 2012 Tribeca Film Festival at the MOMA on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Leelee Sobieski, Jane Rosenthal & Camilla

    Leelee Sobieski, Tribeca Film Festival co-founder Jane Rosenthal and actress Camilla Belle attend 'The Five Year Engagement' Premiere opening night party during the 2012 Tribeca Film Festival at the MOMA on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Judd Apatow & Robert De Niro

    Judd Apatow and Robert De Niro attend 'The Five Year Engagement' Premiere opening night party during the 2012 Tribeca Film Festival at the MOMA on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Emily Blunt

    Emily Blunt attends 'The Five Year Engagement' Premiere opening night party during the 2012 Tribeca Film Festival at the MOMA on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Bill Hader

    Bill Hader attends the Magnum Ice Cream hosted opening night party for the Tribeca Film Festival 2012 premiere of 'The Five Year Engagement' at MOMA on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images for Magnum Ice Cream)

  • Emily Blunt & Kevin Hart

    Emily Blunt and comedian Kevin Hart attend 'The Five Year Engagement' Premiere opening night party during the 2012 Tribeca Film Festival at the MOMA on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Shaun White & Robert De Niro

    Snowboarder Shaun White (L) and Robert De Niro attend 'The Five Year Engagement' Premiere opening night party during the 2012 Tribeca Film Festival at the MOMA on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Judd Apatow, Elizabeth Banks & Bill Hader

    Judd Apatow, Elizabeth Banks and Bill Hader attend 'The Five Year Engagement' Premiere opening night party during the 2012 Tribeca Film Festival at the MOMA on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Leelee Sobieski

    Actress Leelee Sobieski walks the red carpet as she arrives for the showing of 'The Five-Year Engagement' which opens the 2012 Tribeca Film Festival in New York, April 18, 2012. (Photo: EMMANUEL DUNAND/AFP/Getty Images)

  • Jason Segel

    Jason Segel walks the red carpet as she arrives for the showing of 'The Five-Year Engagement' which opens the 2012 Tribeca Film Festival in New York, April 18, 2012. (Photo: EMMANUEL DUNAND/AFP/Getty Images)

  • Kim Cattrall

    Kim Cattrall walks the red carpet as she arrives for the showing of 'The Five-Year Engagement' which opens the 2012 Tribeca Film Festival in New York, April 18, 2012. (Photo: EMMANUEL DUNAND/AFP/Getty Images)

  • Olivia Wilde

    Olivia Wilde walks the red carpet as she arrives for the showing of 'The Five-Year Engagement' which opens the 2012 Tribeca Film Festival in New York, April 18, 2012. (Photo: EMMANUEL DUNAND/AFP/Getty Images)

  • Emily Blunt

    Actress Emily Blunt walks the red carpet as she arrives for the showing of 'The Five-Year Engagement' which opens the 2012 Tribeca Film Festival in New York, April 18, 2012. (Photo: EMMANUEL DUNAND/AFP/Getty Images)

  • Brad Hall & Julia Louis-Dreyfus

    Brad Hall and actress Julia Louis-Dreyfus walk the red carpet at the 'The Five Year Engagement' Premiere during the 2012 Tribeca Film Festival at the Ziegfeld Theatre on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Alison Brie

    Alison Brie walks the red carpet at the 'The Five Year Engagement' Premiere during the 2012 Tribeca Film Festival at the Ziegfeld Theatre on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)

  • Dakota Johnson

    Actress Dakota Johnson walks the red carpet at the 'The Five Year Engagement' Premiere during the 2012 Tribeca Film Festival at the Ziegfeld Theatre on April 18, 2012 in New York City. (Photo by Michael Loccisano/Getty Images)