Michelle Keegan has marked her husband Mark Wright's birthday by sharing a sweet series of images alongside a candid – and very relatable – message about their marriage.MORE: Michelle Keegan rocks figure-hugging ASOS outfit and glamorous hair transformationAlongside a snap of former TOWIE star Mark cradling their beloved dog, Michelle wrote that while her other half "drives her mental" he "keeps her sane" at the same time.The actress' full message read: "Happy birthday to my husband.