Ridge "R.J." Forrester, Jr. is the son of Ridge Forrester and Brooke Logan. Just after Ridge and Brooke's wedding in South America, Ridge was kidnapped and presumed dead after falling into a furnace. Ridge's half-brother, Nick Marone, comforted the grieving Brooke, and Nick and Brooke ended up making love. Ridge turned up alive, and Brooke didn't know if her baby was Ridge's or Nick's. Sally Spectra, Jackie Marone, and Deacon Sharpe all had their reasons for wanting Nick to be the father and separately tampered with the baby's paternity tests; the day he was born, a new test named Ridge his father. Instead of naming the boy Dominick Marone, Jr., as planned, Brooke named him Ridge, Jr. after Ridge.
Some time later, R.J. and his half-sister, Hope Logan, started a fire in the living room after unintentionally being left alone all night. This sparked a custody battle between Brooke and Ridge; eventually, R.J. and Hope were returned to Brooke's care. Years afterwards, the Forrester family worked overtime to make sure R.J. didn't find out that Brooke was missing at sea in a plane crash.
R.J. later attended boarding school in Europe, where Ridge visited him after dumping Brooke on their honeymoon. R.J. returned to Los Angeles with his father; while R.J. was excited by the idea of his parents once again remarrying, he also enjoyed spending time with his aunt, Katie Logan, and his infant cousin, Will Spencer. When Brooke told R.J. she wasn't reuniting with his father after all, R.J. took it in stride, as he did when Brooke reported that she and Bill Spencer, Jr. were getting married instead. R.J. thought it was cool when Bill gave him a sword necklace like all the Spencer men wore, unaware of the hostilities the trinket caused between his father and Bill. R.J. was kept in the dark once again when Ridge went missing in the Persian Gulf after falling out of a helicopter.