DMK chief M Karunanidhi today announced that PMK will be part of the DMK-led alliance in Tamilnadu. Mr. Karunanidhi, who arrived in New Delhi this evening, said he will meet Congress President Sonia Gandhi and Prime Minister Manmohan Singh tomorrow to discuss the seat-sharing arrangement between Congress and DMK in the State Assembly elections due in May. He was talking to reporters on his arrival in the Capital.