Earlier in the day, Knowles gushed over her "sexy, sweet hubby" in a touching Instagram post.
"My Sexy , Sweet, Hubby has a birthday today!" she captioned a current and throwback split shot of Lawson. "Still as handsome and energetic as you were 35 years ago when I first met you ! (Only friends then his sister was my best friend so don't get no ideas ) handsome and fine as wine you make 70 look soo good baby Happy Birthday."
The adorable couple wed on a yacht in Newport Beach, California, in 2015. Beyonce and her sister, Solange, served as bridesmaids, wearing all white along with Knowles.
The 63-year-old mother of two dished on "finding love at any age" and her decision to wear white in an interview conducted days after the wedding.
"It was important to me to have a wedding and walk in white, because sometimes we feel that at a certain age you should act a certain way," Knowles explained to People. "You can find love at any age. You just have to go for it."