Madonna's ex-lover Carlos Leon says he is 'forever grateful' to the singer for giving him his daughter Lourdes.

The personal trainer-and-actor insists he has no regrets about his relationship with the pop superstar in the mid-90s because if it hadn't have happened he wouldn't be a father.

He told People: ''m forever grateful to [Madonna]. I have no regrets. I wouldn't change anything. I got the best thing out of that relationship, and that's my daughter. My daughter is everything to me."

Carlos admits he finds it tough disciplining 14-year-old Lourdes ' who designed the 'Material Girl' clothing line with her mother Madonna - and accepts he can be too soft with her, like a lot of parents with teenagers.

He added: ''m a lenient dad. I'm very empathetic, and I'm good at listening to my daughter . I'm probably a bad dad when it comes to disciplining her."

The 44-year-old actor ' who stars in new film 'Immigration Tango' ' claims Lourdes hasn't started dating yet, and he is 'dreading' the moment when he has to meet her first boyfriend.

He said: ''m dreading it so much, because she's my little girl. I want her to stay young forever. I'm already overprotective, so when the time comes, I will be ready to have a talk with the guy she brings through the door. He better be ready, because I'll give him the rundown!"