( CNN ) -- Leonard Nimoy is n't letting a health battle stop him from enjoying his life . The `` Star Trek '' actor recently revealed on Twitter that he 's been diagnosed with COPD , or chronic lung disease . ( The COPD stands for chronic obstructive pulmonary disease . ) What is COPD ? `` I quit smoking 30 years ago . Not soon enough . I have COPD . Grandpa says , quit now ! ! '' Nimoy , 82 , tweeted . `` Smokers , please understand . If you quit after you 're diagnosed with lung damage , it 's too late . Grandpa says learn my lesson . Quit now . '' His admission prompted fans to express their concern for the actor , who 's lately stayed busy with appearances on TV shows like `` Fringe '' and `` The Big Bang Theory , '' plus popping up at the movies in `` Star Trek Into Darkness . '' But for everyone worried , Nimoy has assured them that he 's hanging in there . `` I 'm doing OK. Just ca n't walk distances . Love my life , family , friends and followers , '' he tweeted . `` Just taped my comments for Star Trek Fest to be aired on EPIX Feb. 16th . Still enjoying my life . ''
Leonard Nimoy has learned he has cancer . He tells his Twitter followers to quit smoking . Even in light of his health problem , Nimoy says he 's still enjoying life .