Despite the cheating reports, Sandra Bullock and boyfriend Bryan Randall are still very much together.

In fact, the "Gravity" actress brought along the model-turned-photographer to the red carpet premiere of her new film "Our Brand in Crisis" at the TCL Chinese Theater in Los Angeles on Monday.

"Sandra, 51, kept a low profile as she left the venue with her photographer beau, 49, who is alleged to have already moved into her home," said Daily Mail. "The couple put on a tactile display as they made their joint exit, appearing very comfortable with one another."

Two weeks ago, OK! Magazine ran an article accusing Sandra Bullock's boyfriend of cheating.

"According to a source, Bryan, 49, was dating his 23-year-old ex, Paris St. John, during the early days with Sandra - and may still be seeing her," it said.

"Bryan kept Paris in the picture as a backup plan," the article alleged. "Now he's trying to cover his tracks."

Sandra Bullock and boyfriend Bryan Randall are both single parents to a son and daughter. But if their relationship progresses, they would have added another brood in the family as the Oscar winner adopted a baby girl.

"Five years after Sandra Bullock adopted her son, Louis, RadarOnline.com has learned that the actress is giving him a sibling! According to sources close to Bullock, she recently finalized the adoption of a baby girl," the report claimed.

"One insider told Radar that Bullock, 51, has brought the infant home to Los Angeles, and has slowly been taking the newest member of her family out in public," it added.

But Sandra Bullock denied that she adopted another baby girl.

"There is only one adopted child in my household and his name is Louis," she said. "If I had a second adopted child, everyone would be hearing about it. I would be loud and clear and say 'Yes, I have officially adopted a second child.' Right now, Louis must be it."