It looks like Max Irons girlfriend does not exist at the moment but this should not be a big trouble for him, because he is so good looking that this would not take too much time to find someone special in his life as soon as he would like to have a girlfriend. Thus it looks like he has not got over the previous Max Irons girlfriend named Emily Browning, who must have been really special in his life. It looks like they have broken up their relationship in the last summer and that is long before The Host came out and Max is one of the leading roles in this movie. Thus is looks like the former Max Irons girlfriend is familiar with Stephenie Meyer because she has been asked to audition for Twilight, but she has declined because she did not want to do anything at that time of her life.
And the current Max Irons girlfriend is – Single
Thus it looks like the former Max Irons girlfriend also had a role in the movie The Host and even though their life as a couple ended it looks like they have gotten the opportunity to be on the set of the movie and even though she was coupled with another actor it looks like they still saw each other and this might have been difficult for either one of them if they still have emotions for each other. Even though the former Max Irons girlfriend had a small role in the movie, still they saw each other in the set. Thus it looks like when they were still dating he had some nice things to talk about the former max Irons girlfriend. In one interview he has talked about himself and about her and the things that they liked to do. It looks like they have enjoyed watching a movie together and they would always fight in order to pick it out. Also it looks like the former Max Irons girlfriend likes to chop things, for example his clothes that she did not like and that he was not wearing.
Thus when the former Max Irons girlfriend and Max would go shopping she would only pick out some small things for him, because their dressing style was different and as he states himself his was boring so he picked out clothes for himself. And now they are not a couple anymore so he is single and on the market.