Goldie Hawn had good reason to smile on Wednesday as her son Oliver Hudson celebrated his 46th birthday.MORE: Goldie Hawn and Kurt Russell's unusual punishment to Oliver Hudson revealedTaking to Instagram, the mom-of-three shared a gushy post dedicated to her son. Much to the delight of her fans, the 76-year-old posted a joyous portrait of the duo beaming for the camera.WATCH: Oliver Hudson shares worrying video after running out of gasGoldie looked fabulous in a plunging maxi dress, whilst Oliver looked particularly dapper in his smart get-up featuring a pair of taupe chinos and a navy-blue shirt.MORE: Goldie Hawn spends time at home away from home before waving grandson off to collegeMORE: Kate Hudson's son takes after famous father Chris Robinson in new photo Bursting with pride, Goldie captioned her post: "Happy birthday my handsome wild and crazy son @theoliverhudson! Deeply love you." Goldie shared a touching messageHer fans raced to weigh in on the post, with one writing: "You and Oliver look so wonderful, Goldie!!," whilst a second penned: "He's gorgeous and so are you.""Such a loving picture of mother and son," wrote a third, and a fourth chimed: "Goldie you look amazing!!!!"Goldie's touching post comes after she opened up about her relationship with long-term partner Kurt Russell after 39 years together.