The Men in Black 3 star has been married to Pinkett for 15 years, but he told People that the couple are as committed to each other as ever.
Smith said: "We make the effort to always put the family first. Being there for each other and being present with our kids is the most important thing.
"I take being a parent very seriously."
The actor added that he is particularly attracted to Pinkett because she always keeps a level head.
"[Jada] is just absolutely hardcore, like she absolutely is unfazed by the weight and the pressures of life," Smith said. "She is so calm and cool and easy in any situation. She can bear anything, and I just love that about her."
Smith recently said that he gives teenage daughter Willow Smith free range over her hair and fashion style, but is nervous about her beginning to date.
Men in Black 3 is now playing in cinemas worldwide.
Watch a trailer for Men in Black 3 below: