The 49-year-old star and wife Sarah Jessica Parker became parents again in 2009 when their daughters Tabitha and Marion Loretta were born via a surrogate.
Speaking to In Touch about the twins, he said: 'They're really good! They're almost two and they're into everything. They run around and pull things apart! They're really good.'
He added that their older son James, eight, has taken really well to having twin sisters.
Broderick said: 'He's really cute with them. He's older than them, so he's very protective and nice.'