New York, Feb 16 : Leonardo DiCaprio's girlfriend Bar Refaeli won't be tying the knot with her superstar beau, if he doesn't agree to her father's demand and convert to Judaism, say reports.

According to Aaron Braunstein, who will be promoting the Brawl at the Wall boxing match between Israeli and Palestinian fighters on July 4, Bar's dad is adamant that Leo will be eligible to be his son-in-law only if he'd embrace their faith.

"He told me that if Leo doesn't convert to Judaism, there will be no marriage," the New York Daily News quoted Braunstein as saying, after he saw Bar's dad in Jerusalem last week.

The `Titanic' star has been dating the Israeli supermodel since 2005.

Recently, Refaeli posed almost half naked for the cover of the Sports Illustrated swimsuit magazine. (ANI)