Eva Longoria Jealous of Nicollette Sheridan's Rock  4/18/06

Latina beauty Eva Longoria has been begging her boyfriend Tony Parker to buy her a huge diamond ring, after seeing her Desperate Housewives co-star Nicollette Sheridan's engagement ring.

Sheridan accepted crooner Michael Bolton's proposal last month (MAR06) after reuniting with her former flame in November (05).

And Longoria, who has been dating San Antonio Spurs basketball ace Parker since January 2005, wants a gem just as large and sparkly.

The show's creator Marc Cherry tells America's People magazine, "She's (Nicollette) got the biggest rock you've ever seen.

"And of course Eva went to Tony Parker and went, 'I want one as big as Nicollette's!' So Tony is very upset with Michael Bolton."