No, Dwayne "The Rock" Johnson did not marry Alison Hammond.
The Rock is married to Lauren Hashian, and Alison Hammond is a British television presenter, known for her work on shows like This Morning and I'm a Celebrity...Get Me Out of Here!
While there have been no reports of a romantic relationship between The Rock and Alison Hammond, they have both been featured on various television shows and have even appeared together on This Morning in 2017.
It is possible that the question arises from their shared appearances on television and their popularity in the entertainment industry.