Nicole Richie debuts adorable baby Sparrow in People

Nicole Richie and Joel Madden debuted their beautiful new son Sparrow James Midnight Madden on the cover of People. Siblings often look the same as babies (duh statement of the day right there) but Sparrow and Harlow don't look all that similar to me. Here's Nicole's People cover with Harlow a year and a half ago. She had bigger eyes (though she's a little older in her People cover) than Sparrow. They're both cute as a bug's ear - and talking about babies is really the best time to use that phrase.

According to People, Nicole and Joel are incredibly happy, and Sparrow and Harlow are bonding wonderfully.

Six weeks after welcoming their first son, Nicole Richie and Joel Madden - along with their 21-month-old daughter Harlow - are showing off the latest addition to their family, Sparrow James Midnight Madden.

'I couldn't be happier,' Richie tells PEOPLE. 'The only thing you want is for your kids to be healthy and happy, and they are. I'm right where I belong.'

In an interview at their home in Laurel Canyon in Los Angeles, Richie, 28, and Madden, 30, her boyfriend and front man of the band Good Charlotte, say they are deprived of sleep, but grateful their daughter Harlow is now fawning over a baby brother.

'I'm glad I had a girl before I had a boy,' says Richie. 'She just loves him so much.' Adds the children's proud papa, 'She's very gentle with him.'

[From People]

As with all unusual celebrity baby names, there's a wide range of opinions on Sparrow. I like his name, were it not for the Midnight.' I think just one standout name is best, otherwise you end up with a Pilot Inspektor situation. There have been rumors floating around since Monday that Joel and Nicole either have secretly gotten married or are about to. According to Radar, they've taken out a marriage license, though they certainly haven't made any announcement. And Nicole's father Lionel Richie made a comment about welcoming Joel into the family. They certainly haven't rushed to the altar, but it would be sweet if they did.