A PACE spokesman said Ukraine's Yulia Tymoshenko is expected to give a speech on Wednesday on a range of domestic issues and her country's foreign policies.
As well as Slovak President Ivan Gasparovic and German Chancellor Angela Merkel, French Foreign Minister Bernard Kouchner will address the session, which will run until April 18.
The PACE Bureau has supported Ukraine's initiative to declare the country's 1932-1933 famine a genocide by the Soviet authorities.
In late 2006 Ukraine's parliament recognized the Stalin-era famine known as Holodomor, which claimed the lives of around 3 million people, as an act of genocide by the Soviet authorities against the Ukrainian people, and urged other countries to do the same.
The Bureau will consider two draft resolutions on the issue, one initiated by the Ukrainian delegation, which proposed commemorating Ukrainian victims only, and a Russian version, under which victims of all nationalities would be commemorated.
The Assembly's Political Affairs Committee will hold a public hearing on Thursday on Chinese developments in the run up to the 2008 Summer Olympics. The hearing will be attended by Chinese officials, a representative of the Dalai Lama, and representatives of human rights bodies.
China accuses the Dalai Lama, Tibet's exiled spiritual leader, of inciting violence in last month's protests in Lhasa in order to sabotage the Beijing Olympics.
Several European leaders have said they may boycott the Olympic opening ceremony over China's crackdown on the protests and refusal to negotiate with the Dalai Lama. Exiled Tibetans say Chinese forces killed around 140 demonstrators, while Beijing says only 18 people were killed, almost all of them Han Chinese murdered by Tibetan separatists.
The PACE session has already approved the mandate of the Russian delegation, which was renewed after the country's December 2 parliamentary election. Konstantin Kosachyov, who heads the State Duma's international affairs committee, remained the head of the delegation, which now includes 22 State Duma and 14 Federation Council (upper house) members.
Andreas Gross, who headed the PACE monitoring group at the Russian presidential election on March 2, will give a report on the election.
Gross said in March that unfair access to media put into question the overall fairness of the victory of Kremlin-backed Dmitry Medvedev, 42. He also said that the election "repeats most of the flaws seen in the parliamentary elections last December."
