United Kingdom, May 5 -- Brian Austin Green's relationship with Vanessa Marcil was "very toxic".

The 51-year-old actor dated his 'Beverly Hills, 90210' co-star between 1999 and 2003, and Brian has now confessed that it "wasn't a loving, caring relationship".

The Hollywood star said on the 'Old-ish' podcast: "Relationships have been interesting for me.

"I had some major missteps . The relationship that I had with Vanessa was very toxic in that way. It wasn't a loving, caring relationship."

Brian also admitted that the turbulent romance fundamentally changed him.

Reflecting on the most impactful relationships in his life, Brian - who has son Kassius, 23, with Vanessa - explained: "With my mom, everything was about me, and with Vanessa,...