From A Wiki of Ice and Fire
|Full Name||Alicent of House Hightower|
|Issue|| Aegon II Targaryen |
|Father||Ser Otto Hightower|
Alicent Hightower was queen and second wife to King Viserys I. She married King Viserys in 106 AL. She was the daughter of Ser Otto Hightower, Hand of the King to Viserys I. She was the mother of King Aegon II, Prince Aemond, Prince Daeron, and Aegon's Queen Helaena.
She married King Viserys I in 106 AL. In 111 AL, a great tourney was held at King’s Landing on the fifth anniversary of the king’s marriage to Queen Alicent. At the opening feast, the queen wore a green gown, whilst the Princess Rhaenyra dressed dramatically in Targaryen red and black. Note was taken, and thereafter it became the custom to refer to “greens” and “blacks” when talking of the queen’s party and the party of the princess, respectively. In the tourney itself, the blacks had much the better of it when Ser Criston Cole, wearing Princess Rhaenyra’s favor, unhorsed all of the queen’s champions, including two of her cousins and her youngest brother, Ser Gwayne Hightower. 
She, her father, and Criston Cole arranged for her son, Aegon II, to get the Iron Throne in place of his half-sister, Rhaenyra, leading to the civil war known as the Dance of the Dragons. When Viserys died, Queen Alicent arranged for his death to be kept secret until her son's succession was secured. At his coronation, she placed her own crown upon the head of her daughter Helaena and addressed her as "my queen." 
After the coronation she moved her chambers to the Tower of the Hand, where her father resided. Every evening before bed, Queen Helaena would bring her children to see their grandmother. Because the Tower of the Hand was less secure than Maegor's Holdfast, Blood and Cheese were able to take advantage of this custom. They stole into Alicent's chambers, slew her bedmaid, and bound and gagged her. When Helaena arrived with the children, they slew Prince Jaehaerys, Aegon's heir, as revenge for the death of Rhaenyra's son Lucerys. Helaena subsequently went mad with grief. 
When Rhaenyra took King's Landing, Alicent was forced to yield. She was bound in golden fetters, but while her father and co-conspirators on the small council were beheaded for treason, Rhaenyra spared her life "for the sake of our father, who loved you once." When Helaena's madness led her to commit suicide by jumping from her window, Alicent cursed her rival. 
Alicent outlived Rhaenyra, but her son lived only half a year after triumphing over his half-sister. Both of his brothers had already died in the war. Alicent's remaining grandson, Prince Maelor, ultimately perished as well, leaving only her granddaughter Jaehaera, who married Rhaenyra's son Aegon III.
References and Notes