London, Feb 23 (IANS) Carlos Leon, who had a passionate affair with Madonna in the 1990s which resulted in their daughter Lourdes, 14, says he will always be grateful to his ex.

The two met in 1994 in New York City but split up seven months after the birth of their daughter in 1997.

"I'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," dailymail.co.uk quoted him as saying.

Speaking to People magazine to promote his new film "Immigration Tango", the 44-year-old actor and personal trainer admitted that he finds it difficult to be strict with his daughter.

"I'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," Carlos said.

Although Lourdes is not dating yet, Carlos said he is not looking forward to when that day comes.

"I'm dreading it so much, because she's my little girl. I want her to stay young forever. I'm already protective, 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!" he said.

Carlos and Madonna still have a very friendly relationship, and have even been seen in recent years working out together and spending time with their child.