The 46-year-old 'Two and A Half Men' star took to the micro-blogging site to promote his father Martin Sheen's appearance on his new show 'Anger Management', reported TMZ online.
"It's on! My pop guest stars Thursday on Anger Management. Watch my dad show up as my dad 9:30p on FX. Best yet!!" Charlie posted.
The actor included a photograph of him and Martin sharing some laughs and a couple of beers from the set of the show.
Charlie had quit the popular site on July 13 with a typically bizarre post, "reach for the stars everyone. dogspeed cadre. C out sic)."