The "Girls Next Door" star is three months along with the pregnancy and is due in August, reported People magazine.
"I'm so excited," the reality show star said about the second pregnancy.
"This time I know what to expect a little bit more. [That] makes it even more enjoyable!" The 36-year-old went on saying she's "kind of feeling the boy vibe. We'll see how psychic I am!"
Madison and Rotella are already parents to over two-year-old girl named Rainbow Aurora Rotella.
Rotella also shared the news on Instagram by posting a video of the sonogram. "Blessed and excited to announce @hollymadison & I have a baby owl on the way! can't wait to welcome another beautiful soul into our family & watch #rainbowaurorarotella become a big sister! #hollymadison," he captioned it.