Ashlee Simpson wants ''one more'' child.

The 33-year-old singer already has nine-year-old son Bronx with her former husband Pete Wentz, and two-year-old daughter Jagger with her second husband Evan Ross, but she is keen to expand her brood once more by having a second baby with the 'Hunger Games' actor.

She said: ''One more. I definitely want to have another one, for sure. I love being a mom. I mean there's really nothing greater than my kids. So, for me, that's something I continue to want to do in life.''

And Evan, 29, agrees, as he thinks his wife - whom he married in 2014 - is an ''amazing mother''.

He added: ''I got lucky. The fact that I've got a wife who is such an amazing mother, but also so extremely talented. I think there's always a time for everything. She's ready now to show her entertainment side and all that kind of stuff. It's amazing to watch cause she's so talented.''

On top of planning her third child, Ashlee is also considering a return to music, and says her two tots are as ''excited'' as she is about the prospect.

Speaking to E! News, Ashlee said: ''And it's cute cause the kids get excited. I'll see Bronx playing my old music for Jagger and I'm like, 'Oh my God, that's so cute!' and then when we play our new music they're always there listening and it's so sweet.''

Meanwhile, the happy couple are set to showcase their family life in their new reality show 'Ashlee and Evan', and have insisted having cameras in their home won't put a strain on their marriage.

Evan said recently: ''I think in any relationship in this industry, there's a stress on relationships.

''I think that's reality, but in no way do I think that if a relationship is meant to be together and a marriage is meant to be together, that anything like a show or being in this industry can change that.

''I don't think any fear is coming from our relationship, which is a good thing.''