The Royals (TV series)

Helena is the matriarch of a fictional contemporary British royal family who must struggle with both common and atypical family dramas while in the public eye. Twins Prince Liam and Princess Eleanor enjoy the hedonistic pleasures available to them as royals, knowing that their older brother Robert bears the responsibility of being heir to the throne of England. But when Robert is killed, the family is thrown into disarray and a grieving King Simon fears for the future of the monarchy. Unexpectedly next in line for the throne, Liam must adjust to his new role while navigating his attraction to Ophelia, the American daughter of the royal head of security. His self-destructive sister Eleanor finds rock-bottom when her bodyguard turns out to be a conman. Trying to preserve the status quo and keep the royal family under her control, Queen Helena allies herself with Simon's brother Cyrus to preserve their way of life at any cost.

Question: are liam and eleanor twins on the royals
Answer: yes