Gandalf is a wizard, one of the five Istari or “Wizards” who were sent to Middle-earth by the Valar, the angelic beings who shaped the world. He is also known as Mithrandir, the Grey Pilgrim, and is considered the oldest character in the Lord of the Rings.
Treebeard is Fangorn, the guardian of the forest; he is the oldest of the Ents, the oldest living thing that still walks beneath the Sun upon this Middle-earth .... '
Gandalf is certainly older. Gandalf is one of the Maiar, and the Maiar were created before the World was created. Elrond is called “Elrond Half-elven” because one parent was elf and the other human. He wasn't born until after Elves (first) and Dwarves (second) and Men (third) had appeared in the World.
Gandalf's age is impossible to determine, but he's likely existed for at least 10,000 years, making him much older than Legolas.
Elrond's was born nearly 600 years after Galadriel, but he was born as a half-elf, and so until he made the choice to become an elf, he aged at a faster rate, though still slower than mortals. Tolkien says that his initial 24 "growth years" took 24 sun years, after which each life-years took five sun years.
Apperently Legolas is older than Elrond : r/lotr.
In the year 121 of the Fourth Age, after Aragorn's death, Arwen died of a broken heart at Cerin Amroth in Lórien, and was buried there one year after the death of Aragorn, to whom she had been wedded for 122 years. She was 2901 years old.
Aragorn led the forces of the Reunited Kingdom on military campaigns against some Easterlings and Haradrim, re-establishing rule over much territory that Gondor had lost in previous centuries. He died at the age of 210, after 122 years as king.
That said, the people behind the “official movie guide” for The Lord of the Rings list Legolas as being born in the year 87 of the Third Age of Middle-earth, which makes him some 2,931 years old around the time of the War of the Ring, which happened over 3,000 years into the Third Age of Middle-earth.
Together, the two of them were known as the Blue Wizards. The one in brown was Radagast and the one in grey was Gandalf, seemingly the oldest and the least of the Order.
Over the next 17 years, Gandalf travels extensively, searching for answers on the ring. He finds some answers in Isildur's scroll, in the archives of Minas Tirith. Gandalf searches long and hard for Gollum, often assisted by Aragorn, who eventually succeeds in capturing Gollum.
Shelob, who is even older than Sauron, serves as a kind of guard for one of the entrances to Mordor.
Many Lord of the Rings fans also say Tom Bombadil is actually the most powerful character in all of Middle Earth, due to his apparent immortality, ability to completely resist the Ring, power over his domain, and knowledge that comes from living since the beginning of time.
It also explains why he can't take the ring to Mordor and destroy it himself, because he is encased within his borders, and cannot step outside them.
He had already celebrated his 131st birthday, becoming the oldest Hobbit in the history of Middle-earth. As a mortal, he died in the West. While sailing west, Bilbo composed a last poem looking back on Middle-earth in farewell.
Aragorn is not half Elf, although he is a descendant of Elros, who is half Elf (and the brother of Elrond, the half-Elf who raised him), which explains why Aragorn's life span is unusually long.
Frodo and Bilbo were comfortable and well off until T.A. 3001. At this time, Bilbo threw an enormous party to celebrate his 111th birthday, and Frodo's 33rd, the date of Frodo's coming of age. At this party Bilbo gave his farewell speech, and made his long-planned "disappearance" and withdrawal from the Shire.
Elrond confronts Aragorn in The Return of the King and says that Arwen is dying, her fate tied to the Ring. Arwen isn't necessarily dying because of the Ring, but now that she is mortal, she is dying through the slow decaying of time.
Legolas was portrayed by Orlando Bloom. In the "official movie guide" for The Lord of the Rings, a birthdate for Legolas is set to 87 of the Third Age. This would make him 2931 years old at the time of the War of the Ring. This date for Legolas' birth was made up by the movie writers.
Narrative. Arwen was the youngest child of Elrond, lord of the Elvish sanctuary of Rivendell and leader of the High Elves remaining in Middle-earth at the end of the Third Age, and Celebrían, daughter of Galadriel, ruler of the Elvish forest realm of Lothlórien. Her elder brothers were the twins Elladan and Elrohir.
According to 'The Tale of Aragorn and Arwen', from Appendix A of LotR, Aragorn II (Elessar) and Arwen had at least three children: one son, Eldarion, who succeeded his father as king, and at least two daughters, as there is a mention of unnamed 'daughters'.