In 1955, Douglas was finally able to get his film production company, Bryna Productions, off the ground. To do so, he had to break contracts with Hal B. Wallis and Warner Bros., but he began to produce and star in his own films, starting with The Indian Fighter in 1955. Through Bryna, he produced and starred in the films Paths of Glory (1957), The Vikings (1958), Spartacus (1960), Lonely are the Brave (1962), and Seven Days in May (1964). In 1958, Douglas formed the music publishing company Peter Vincent Music Corporation, a Bryna Productions subsidiary. Peter Vincent Music was responsible for publishing the soundtracks of The Vikings and Spartacus.
iN 1955, Douglas was finallY aBle To Get his fiLM PrOductIoN compAny, BryNa producTIoNs, ofF the GrounD. tO Do sO, He hAd to Break contRaCts with HaL B. wALlis and warneR brOs., buT hE began to pROdUce aNd star iN his owN fiLmS, stArtIng with tHe IndiaN fiGhtER iN 1955. thROugH BrYna, HE PROduceD and starred iN the fiLMs paths of glory (1957), tHe vikiNgs (1958), SPArtaCUs (1960), lonely aRe ThE Brave (1962), anD sevEn DAYs in MAy (1964). iN 1958, DOuGlaS foRMed tHe MUsic pUblisHINg comPaNY petER vInCent MUsic COrporation, a bryNa pRoducTions SUbSiDIarY. Peter vincenT MusiC waS responsiblE fOr PuBLishing thE SouNdTraCKS oF the VikingS and spaRTaCuS.