Johnny Carson's longtime sidekick, Ed McMahon, is in jeopardy of losing his multimillion-dollar mansion after falling behind on his housing payments, Los Angeles Times reported.

According to ForeclosureRadar, a company that sells default data pulled from public records, McMahon defaulted on $4.8 million in mortgage loans with a unit of Countrywide Financial Corp., which filed a notice of default in late February. Although the 85-year-old "Tonight Show" sidekick initially borrowed $4.5 million from the property, he later took out an additional $300,000 loan against the home.

The former "Star Search" host has been unable to work since he broke his broke his neck 18 months ago, his spokesman Howard Bragman, said.

"He's not alone. There are plenty of people affected by the weak economy, bad housing market or bad health," Bragman said, adding that McMahon is weighing his options with the bank and is hoping to reach a resolution soon. It is unclear yet whether he and his wife, Pamela, will remain in the house for long.

McMahon has been attempting to sell the six-bedroom, five-bath home for two years, but due to the weak property market in the state, no buyers have come forward.

The agent hired by the TV personality to sell the property, has also blamed the house's location on the lack of interest from buyers, as its close proximity to Britney Spears' home has been putting people off. Another difficulty for the area has been a mold contamination that has plagued a number of homes, including McMahon's.

Over 650,000 foreclosure filings, which include notices of default, auction sales and bank repossessions, have been issued during the first quarter of 2008. That's up 23% from the last quarter of 2007, and up a staggering 112% from the same period a year ago, CNN Money reported.

Retired baseball star Jose Canseco has reportedly already lost his California home in foreclosure.