Katherine Heigl is happy to talk to her two daughters about their biological mothers as much as they're "comfortable" with

She shared: "They do have more questions as they get older. We have said to them, this is your story. We don't have any information about your biological fathers, but we do have a bit about your biological mothers.

"If you guys want to talk more about them, you can have as much or as little information as you want. Tell us what you're comfortable with knowing."

And the 42-year-old actress admitted the lockdown owing to the coronavirus pandemic has given her the most "consistent" time spent with her children.

Speaking to the April issue of Parents magazine, she added: "This is the longest period I have consistently spent with my children. At first I loved cooking inspired meals, but now I'm like, 'Kids, just make yourself a sandwich.'"

Meanwhile, Katherine previously banned screen time in her home after her daughters got "addicted" to gaming through the lockdown.

She admitted: "I'm actually more of a drill sergeant ... I caved but only because Apple now has that feature, the Screen Time feature, and my girlfriend was recently visiting, and she taught me how to use it. So I have ultimate control over the devices, and I feel like, OK, I can safely do this now. They can be safe on there, and I can be sure they're safe, so they have access to, like, books ... We started out allowing them to play that 'Roblox' game.

"They would be in their rooms playing this game together, the two girls, for like six to seven hours. We were pretty lax about it. And then I realised that was wrong and not healthy. So I tried to scale it back, and then it was just this addiction for them, so I kinda had to completely take devices away."