Sandra Bullock is "more open" to the possibility of getting married again. The 'Blind Side' actress - who was wed to Jesse James for five years from 2005 to 2010 - is having a great time with photographer Bryan Randall and is thought to be considering the possibility of tying the knot for a second time. A source said: "Sandra and Bryan are life partners. Their close friends have never seen Sandra this happy before. "Sandra as of lately has been more open to the possibility of getting married again." The 51-year-old star - who has two children Louis, six, and Laila, four - is said to be in a "very serious" relationship with the 50-year-old snapper and the pair recently went to Universal Studios in Hollywood for a family fun day. The source added to E!: "They are enjoying the last bit of the summer with the kids until school starts. "They will be in Los Angeles more once the kids start going to school. Things are very serious with them." However, Sandra's former teacher recently warned her not to marry Bryan, insisting her late mother would not approve. Geraldine Filpi, 81, said: "I don't think she should marry Bryan. If her mother was still alive, there's no way Sandra should marry him. "Sandra just has poor judgement in men and seems to keep making really bad choices. You know, she's a great actress, but she's already so successful and has a wonderful family now. So why bother taking risks? I pray for her. I pray she steers away from the bad men." Bryan reportedly went to rehab for drug issues in the early 1990s.