Tyrone William Griffin Jr. (born April 13, 1982), known professionally as Ty Dolla Sign (stylized as Ty Dolla $ign or Ty$), is an American singer, songwriter and record producer from Los Angeles, California. He gained initial recognition for his guest appearance on fellow Los Angeles rapper YG's 2010 single "Toot It and Boot It", which entered the Billboard Hot 100. He signed with Atlantic Records in 2012, and Wiz Khalifa's Taylor Gang Entertainment the following year.

Griffin saw further mainstream recognition for his debut commercial extended play (EP), Beach House EP (2014). Its release was preceded by his 2013 single "Paranoid" (featuring B.o.B), which marked his first entry—at number 29—on the Billboard Hot 100 as a lead artist. Its 2014 follow-up, "Or Nah" (featuring Wiz Khalifa and DJ Mustard, remixed with the Weeknd) was met with continued success and received sextuple platinum certification from the Recording Industry Association of America (RIAA). His debut studio album, Free TC (2015), peaked at number 14 on the Billboard 200 and was supported by the platinum-certified singles "Blasé" (featuring Future and Rae Sremmurd) and "Saved" (featuring E-40). His second album, Beach House 3 (2017) peaked at number 11 on the Billboard 200, while his third album, Featuring Ty Dolla Sign (2020) peaked at number four. He has released the collaborative albums MihTy (2018) with Jeremih, Cheers to the Best Memories (2021) with Dvsn, and Vultures 1 and 2 (2024) with Kanye West—Vultures 1 became his first to debut atop the Billboard 200.

Along with his own career, Griffin is known his frequent guest appearances on songs by other artists; these include the Billboard Hot 100-top 40 singles "Work from Home" by Fifth Harmony, "Swalla" by Jason Derulo, "Hot Girl Summer" by Megan Thee Stallion, "Hit Different" by SZA, "WusYaName" by Tyler, the Creator, and "Psycho" by Post Malone—the latter became his first to peak the chart and received diamond certification by the RIAA. Furthermore, Griffin has been credited with songwriting and production work for other artists, most notably on the singles "Loyal" (2013) by Chris Brown, "Post to Be" (2014) by Omarion, and "FourFiveSeconds" (2015) by Rihanna, Kanye West and Paul McCartney, among others. He has received five Grammy Award nominations.