Sources tell Us Weekly the exes are so friendly that they even go on double dates together with their new partners: Olympic skier Lindsay Vonn and millionaire Chris Cline.
"They can be a happy foursome now that Elin has a guy even richer than Tiger," an insider said. "They've hung out at the Seminole Club [in Florida]."
The source went on to say the foursome has even "hung out together with other people."
Reports about the former couple's double dating habits comes one week after news broke that Vonn, 29, and Nordegren are "close."
"After meeting her, she found she actually liked her," a source says. "You'd think it would be weird, but Elin loves Lindsey and they talk all the time. Elin likes that Lindsey is a strong woman."
Woods and Nordegren finalized their controversial divorce in 2010. The two have two children together: a 6-year-old daughter, Sam, and a 5-year-old son, Charlie.