Josh Kelley and his movie star wife, Katherine Heigl, are already the proud parents to their 3-year-old daughter, Naleigh. But the happy couple hope to give her a sibling ... or two ... or three ... maybe even four, in the near future.

"I used to want like six kids," Heigl said in an episode of 'The Ellen DeGeneres Show' that aired earlier this week [quote via PEOPLE]. "[But now] we’re thinking maybe like three to four kids. That would be my ideal."

DeGeneres then did her part in pointing out that "three to four kids" is still quite a lot considering her red-hot acting career and her husband's music that has him on the road touring coast-to-coast.

"That’s still a lot, isn’t it?" Heigl grinned. "Alright ... maybe two."

Kelley better make sure he leaves plenty of room open on his other arm for the future children in their household. Just recently, Kelley visited a tattoo parlor in Los Angeles where he had some new ink done on his left forearm, dedicated to Heigl and Naleigh. The tattoo symbolized both of their birthdays -- November 24 (Heigl) and 23 (Naleigh) -- each of which fall under the Sagittarius sign.

Kelley is back out on the road this week with his brother Charles' band, Lady Antebellum, on their Own the Night tour. Click here to see where the tour will be stopping next.