Credit: Ahmad Elatab-SaleemElatab/Splash News Online

Suri Cruise, 4, sported a dancing-themed costume as she joined mom Katie Holmes at a Los Angeles-area Halloween party Sunday night.

Later, she dressed as a princess while she went Trick-or-Treating sans dad Tom Cruise (who has been overseas shooting Mission Impossible 4).

Could Cruise, 48, and Holmes, 31, be dressing up another little one next year?

"Maybe in a couple of years, but right now I want to make sure I'm really there for Suri," she said in the October issue of Marie Claire when asked if she's having more kids. "I'm the youngest in my family – my closest sister is five years older than me, and the next one is nine years ahead of me, so I was a bit of an only child, and I liked it! I liked having all of my mom's attention, and sometimes I think I still do."