Spencer Pratt said to be shopping "Speidi" sex tape

Reality television personalities Spencer Pratt (L) and Heidi Montag arrive at the 2008 MTV Video Music Awards in Los Angeles September 7, 2008.

LOS ANGELES (Reuters) - Talk about a sticky celebrity web.

"The Hills" TV stars Spencer Pratt and Heidi Montag, once dubbed "Speidi" as a couple but now in the throes of a nasty divorce, found themselves at the center of a new controversy on Friday when Pratt was reported to be shopping around a sex tape that he claims features himself and his estranged wife.

Celebrity website TMZ said Pratt had asked for a meeting with Los Angeles porn film company Vivid Entertainment about selling the alleged tape. Vivid co-chairman Steven Hirsch told TMZ he had spoken with Pratt "about a sex tape with Heidi Montag...We are in early negotiations to possibly come to terms for a deal."

Pratt later told UsMagazine.com that he has "been making films since I was in the 7th grade. I'm looking forward to people seeing my directorial debut".

A spokesman for Montag could not confirm the existence of a tape and said the actress was filming on location and could not be reached. A Vivid spokeswoman was not immediately available.

Montag, 23, is in the process of divorcing Pratt, 27, after 15 months of marriage. Pratt said earlier this week that he planned on writing a tell-all book about their relationship, which began when they were both featured on the MTV series. Montag told TMZ she might sue to block it.

"The Hills," a reality show about young people in Los Angeles, ended in July after four years. While the show was on air, Pratt and Montag were regulars at numerous red carpet events. Their faces were splashed over celebrity magazine covers, and they were often featured on Hollywood shows.

(Reporting by Bob Tourtellotte; Editing by Jill Serjeant)