Good for them, they look happy! I wonder if it can make a big difference to be with someone from a different 'class' so you're not dealing with all the same problems of exposure. What I mean is, a celeb dating another celeb has to deal with that person having the same or more amount of options and competition for attention vs dating a 'normal' person that would really feel like its a big deal if they were worthy of your attention. Not implying that a celebrity is intrinsically better or anything, but just it probably feels nice to think you may not have everyone and their mother sliding into your significant other's DMs.