Expecting Stars: Amy Poehler's Pregnant

(CANVAS STAFF REPORTS) - Spring is in the air and with it comes the latest celebrity baby news.

According to USMagazine.com , "Baby Mama" star Amy Poehler, 38, is expecting her second child with husband Will Arnett.

It looks like their 16-month-old son, Archie, will welcome a new baby brother or sister later this year.

Poehler recently told TV Guide that she's just like most working mothers trying to juggle jobs and babies: "It's a day-to-day thing …You just do your best and try to make it work."

The former "Saturday Night Live" cast member isn't the only star adding to her brood this year.

Kevin Costner's rep confirmed to People.com that he and wife, Christine Baumgartner Costner, are expecting their third child together – the seventh for the actor – in June.

Joining the throng of stars expecting spring babies, is "Julie and Julia" star Amy Adams who will also be giving birth to her first child in a few weeks, reports the Daily Mail .

Adams admits that she is trying to get in as much shut-eye as possible before the baby comes: "I'm so excited. I think we're just enjoying the moment. I'm getting a lot of sleep."

Meanwhile "Shopaholic" author Sophie Kinsella announced on her Web site this week that she is going to be welcoming a new bundle of joy in April: "This has been an amazingly busy year for me – and it's about to get busier! Next month … I'll be having a new baby!"

And Madeformums.com reports that "Shakespeare In Love" actor Joseph Fiennes, 39, was "utterly thrilled" to welcome a daughter – his first child – with his wife Maria Dolores Dieguez on March 8.