Oscar Branning is a fictional character from the BBC soap opera *EastEnders*. He is the son of Ronnie Mitchell and Jack Branning, though for a considerable portion of his young life, Jack was unaware of his paternity. Oscar’s storyline primarily revolves around family drama, secret paternity, and the complex relationships within the Mitchell and Branning families. Born in 2010, Oscar’s existence was initially a well-guarded secret. Ronnie, grappling with the trauma of losing her baby son James, secretly switched her deceased child with Kat Moon and Alfie Moon’s newborn son, Tommy. This act led to a period of intense psychological turmoil for Ronnie and immense heartbreak for Kat and Alfie when the truth eventually emerged. After the ordeal, Ronnie discovered she was pregnant again and gave birth to Oscar. Initially, Ronnie kept the identity of Oscar’s father a secret, leading everyone, including herself, to believe that Joel Reynolds was the father. However, a DNA test later revealed that Jack Branning was in fact Oscar’s biological father. This revelation threw both Ronnie and Jack’s lives into disarray. Jack, already a father to daughters Amy and Penny, struggled to come to terms with having another child, particularly given the volatile nature of his relationship with Ronnie. Ronnie and Jack’s relationship was tumultuous, marked by passion, betrayal, and mistrust. Despite the constant ups and downs, they eventually married, creating a seemingly stable home for Oscar. However, their happiness was short-lived. Their marriage ultimately collapsed, and Ronnie tragically died on their wedding day alongside her sister Roxy, leaving Oscar orphaned of his mother. Following Ronnie’s death, Oscar, along with Amy, went to live with Jack. Jack, burdened by grief and guilt, dedicated himself to raising his children. Oscar’s storyline then shifted to focus on his adjustment to life without his mother, the dynamics within the Branning household, and his relationship with his half-sister, Amy. Oscar’s character has not been prominently featured in recent *EastEnders* storylines. As a young character, his role has largely been reactive to the dramas surrounding the adult characters, particularly those of his father and his deceased mother’s family. His presence served as a reminder of Ronnie’s legacy and the complicated history of the Mitchell and Branning families. Although his appearances are less frequent now, his familial connections within Walford ensure that Oscar remains a significant figure in the backdrop of *EastEnders*. His future storylines could potentially explore the long-term impact of his mother’s death and the complexities of growing up within such a dramatically charged environment.