Nick Lachey's wife says their little boy is ''the sweetest guy.''

Vanessa Lachey enjoys watching their 19-month-old son, Camden, reach new milestones and loves that he is very affectionate.

The 33-year-old star told ''He's the sweetest guy, he gives you kisses and hugs and just wants to play. It's really cute to watch him grow, learn and become this little man.''

The brunette beauty is surprised by Camden's vocabulary and thinks he is very intelligent.

She explained: ''He says, 'Avocado please, yogurt please, strawberries please, down please,' or, 'Come here,' which means pick me up, 'Love me, hug me, kiss me,' -- that's his favourite thing.

''He likes to learn, he's so good. His verbal level to me is beyond what I've expected and he doesn't get aggressive.''

She added: ''He's obsessed with books, he goes and gets his flash cards and he loves cars, fire trucks, taxi cabs [and] anything having to do with transportation.''

Vanessa and Camden recently moved to New York City with former 98 Degrees star Nick for his new presenting job on VH1's 'Big Morning Buzz Live!'

And the 40-year-old star previously admitted they are thinking about having another baby in the near future.

He said: ''We won't wait too much longer. I really want to have a little girl.''