United Kingdom, June 27 -- Charlize Theron's daughters won't let her use their favourite slang words.

The 49-year-old actress - who has adopted kids Jackson, 12, and nine-year-old August - think she is "too old" for certain popular terms, while she is "not allowed" to use other phrases because they have gone out of fashion.

Walking the red carpet in a fishnet Givenchy outfit at the Los Angeles premiere of her latest movie The Old Guard 2, Charlize told Extra of her look: "August gave it a thumbs-up."

Host Terri Seymour then asked: "What do they say? Would it be 'snatched'? Do we say you're looking 'snatched'?"

Charlize admitted: "Apparently, I'm not allowed to say it. There's so many things I'm just not allowed to say anymore. I'm sti...