Christina Applegate wants more children but thinks she might be too old.

The 41-year-old actress and her husband Martyn LeNoble have a two-year-old daughter Sadie Grace together and although they would love to expand their family, Christina doesn't know if she has the energy for sleepless nights with a newborn.

She told 'Access Hollywood': ''I think we both want to make another Sadie. watch this little person and she's so perfect and she enhances our life so much that you go, 'God - how could we not produce more of these?'

''We're both kind of like, 'Eh, we're a little old' - we don't know.

''I'm 41 years old and I don't know if I could do the whole not sleeping thing again. If I was 35, then maybe I'd have the energy.

''When I get up it hurts. Some people can do it and I say, 'Hats off to you.' That's just how I feel right now.''

Christina recently revealed she loves hanging out with Sadie, who she calls her ''little best friend''.

She said: l''Her language skills are incredible. Sadie and I talk about what she dreamt about, we talk about what we're going to do that day, we talk about what we did the day before, and we talk extensively about these things.

''It's really a fun part of her development. Now she's my little person, she's my little best friend.

''I'm watching what she finds funny now. If she sees something that she really thinks is funny, she does this crack-up on her own. It's really awesome to see, 'Oh wow, you're learning what tickles you.' It's not influenced by anybody else, which is really a cool, new thing.''