If you like to go in depth
Dramatic monologue: a kind of poem in which a single fictional or historical character other than the poet speaks to a silent ‘audience' of one or more persons. Such poems reveal not the poet's own thoughts but the mind of the impersonated character, whose personality is revealed unwittingly; this distinguishes a dramatic monologue from a lyric, while the implied presence of an auditor distinguishes it from a soliloquy. Major examples of this form in English are Tennyson's ‘Ulysses' (1842), Browning's ‘Fra Lippo Lippi' (1855), and T. S. Eliot's ‘The Love Song of J. Alfred Prufrock' (1917).
The Dramatic Monologue
Lord Alfred Tennyson, Ulysses
R. Browning and his My Last Duchess
The evolution of the dramatic monologue
The Pre- Raphaelite Brotherhood (teacher's notes)