It's not too complicated between Denise Richards and Charlie Sheen .

The exes, who were married for four years until 2006, reunited on the red carpet at the premiere for Charlie's new two-part Netflix documentary aka Charlie Sheen Sept. 4, marking their first red carpet appearance together since 2005. (That February, the two attended the SAG Awards together prior to their split).

Denise and Charlie—who share daughters Sami , 21, and Lola , 20—were all smiles as they posed arm-in-arm for photographers and, at one point, even shared a hug.

The Real Housewives of Beverly Hills alum looked chic in black satin pants and a sheer, sparkling black crop top that she wore over a black bandeau top. Meanwhile, the Two and a Half Men star was handsome in dark jeans, a white

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