The former Privileged star, 33, broke the news to fans via her Twitter.com blog on Monday (12Nov12), revealing she was overjoyed to share her big secret.
She tweeted, "So happy to finally be able to share our news! Nick and I are expecting our first baby in 2013! Feeling so blessed and beyond excited!"
And in a similar post on New York Yankees outfielder Swisher's Facebook.com page, they write, "Words can't describe how blessed we feel to be expanding our family and are anxiously awaiting the arrival of our new addition. Your support and kindness has meant so much to us throughout the years and we wanted to personally share the news with you all."
The couple wed in December, 2010.