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'Being Charlie': Rob Reiner opens up about working with his son

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Rob Reiner is one of Hollywood’s most successful directors, responsible for some of the industry's most popular comedies and dramas. But his latest project tackles the more personal issue of substance abuse and rehab. Reiner says of his son, who is one of the screenwriters of the film and battled substance abuse himself, "What I didn't understand was the depth of what he was going through".