Ashlee Simpson 'loves' Tony Romo

Ashlee Simpson loves her sister's boyfriend Tony Romo - and isn't afraid to admit it.

"I love him!" the 23-year-old gushed at the Pure TV Grammy party at Goa nightclub in Hollywood last night.

When asked if she is happy for big sister Jessica, she replied, "Absolutely happy. He is really cool."

Ashlee's beau, Fall Out Boy bassist Pete Wentz also spoke of the Dallas Cowboys quarterback, saying: "He is a cool dude."

Simpson and Wentz kept tight lighted when asked about their own Valentine’s Day plans next week.

“We can't tell each other, so we can't tell you,” Ashlee, who just released her new single “Outta My Head,” told American magazine Us Weekly.

When asked if the two, who’ve been dating since late 2006, were ready to tie the knot, Simpson chuckled.

Added Wentz, "Maybe we will do it right here. Right here tonight. It is a big wedding night."