Grandmother of Leonardo DiCaprio's new model lover warns him not to mess with her or....

Hollywood's most eligible bachelor ,Leonardo DiCaprio had better be on his best behavior with stunning Victoria Secret model, Nina Agdal or face the wrath of her family.

They have exclusively confirmed to MailOnline that the 41-year-old Oscar winner and Danish born Nina, 24, are dating.Her grandmother Lona revealed the pair are in a relationship - but had a warning for the playboy star should he treat her granddaughter badly.

We have not said hello to him [DiCaprio] but we hope that he behaves towards her. Otherwise he will get me to deal with,' said Lona at her home in Denmark.

'I can tell you that it is six years since they first met, and now the relationship apparently developed.'She is rarely home because she is very busy. I have fortunately an email from her once in a while, and I am of course happy,'