David Arquette's wife is his ''hero''.

The 'Scream' star has praised his wife Christina McLarty for being such a good mother to their two-year-old son Charlie despite being pregnant with their second baby.

He said: ''She's doing good. It's not easy, it's so hard. I think the second pregnancy is a little harder than the first. She's got morning sickness on this one.

''Being pregnant and watching a little rascal that's firmly in his terrible twos is pretty difficult. She a trooper, she's doing great. She's my hero.''

And the 45-year-old actor - who also has 12-year-old daughter Coco with his ex-wife Courteney Cox - is so proud of his son Charlie's preparations to become a big brother.

He added to People magazine: ''Charlie is really cute about it. We have little books that prepare him. We'll see how it goes when it all goes down. He's a tricky little bugger.''

In October, the couple took to Instagram to share the happy news that they are expecting their second child together.

David wrote: ''So incredibly blessed and honored that my wife @christinaarquette is pregnant with a baby boy! Thank you Christina and humbled gratitude to G-D for this tremendous gift! Charlie and Coco are so excited and I am over the moon!!! (sic)''

Meanwhile, David previously admitted his closeness to ex-wife Courteney can be ''awkward''.

He said: ''It's awkward, too - like, we get married, and there's beautiful pictures of our wedding, and there's also a picture of me and my ex, and it's like, 'Ooh! I've been married before!' We have Coquette Productions so we produce things together and work together. It's just awesome to work together. I love her. We were married for 13 years or something and we have the baby. You just can't throw all that away.''