"They're so excited," a friend of the couple says. "They're so happy."
The Beverly Hills 90210 star is 14 weeks pregnant.
Spelling, 33, and McDermott, 39, wed in Fiji in May. "The feeling is overwhelming," McDermott told PEOPLE at the time. "We're soul mates."
On their nine-day honeymoon in Fiji, "we're going to make a baby," McDermott said. "We want to have nine kids!" Added Spelling, "He likes to play hockey, so we're going to make a hockey team."
The couple met in the summer of 2005 while in Canada filming the TV movie Mind Over Murder. They were both married at the time – she to actor-writer Charlie Shanian, he to Toronto TV personality Mary Jo Eustace.