A ladder assembly for an above-ground pool, the ladder assembly comprising: a first ladder portion comprising a first pair of support rails and having an upper end; a second ladder portion comprising a second pair of support rails and having an upper end connected to the upper end of the first ladder portion via a bridging portion, and a lower end opposite the upper end of the second ladder portion; a third ladder portion, moveably connected to the second ladder portion, comprising a third pair of support rails, and having an upper end and a lower end, opposite the upper end; and a connection mechanism (23F, 23G) comprising: a connecting rod comprising a first end rotatably connected to the second pair of support rails of the second ladder portion and a second end rotatably connected to the third support rails of the third ladder portion, and a first snap connector detachably connected to the second ladder portion and the third ladder portion when the ladder is in an operational position and a second snap connector, which connects a lower portion of the third ladder portion to the bridging portion when the ladder is in a non-operational position wherein the connection mechanism (23F, 23G) connects the third ladder portion to the second ladder portion such that the third ladder portion can switch between an operational position in which the lower end of the third ladder portion is adjacent to the lower end of the second ladder portion, and wherein an upper portion of the second ladder portion is fixedly connected to an upper portion of the third ladder portion by the first snap connector, and the non-operational position in which the lower end of the third ladder portion is spaced apart from the lower end of the second ladder portion in a direction toward the upper end of the second ladder portion. a first ladder portion comprising a first pair of support rails and having an upper end; a second ladder portion comprising a second pair of support rails and having an upper end connected to the upper end of the first ladder portion via a bridging portion, and a lower end opposite the upper end of the second ladder portion; a third ladder portion, moveably connected to the second ladder portion, comprising a third pair of support rails, and having an upper end and a lower end, opposite the upper end; and a connection mechanism (23F, 23G) comprising: a connecting rod comprising a first end rotatably connected to the second pair of support rails of the second ladder portion and a second end rotatably connected to the third support rails of the third ladder portion, and a first snap connector detachably connected to the second ladder portion and the third ladder portion when the ladder is in an operational position and a second snap connector, which connects a lower portion of the third ladder portion to the bridging portion when the ladder is in a non-operational position a connecting rod comprising a first end rotatably connected to the second pair of support rails of the second ladder portion and a second end rotatably connected to the third support rails of the third ladder portion, and a first snap connector detachably connected to the second ladder portion and the third ladder portion when the ladder is in an operational position and a second snap connector, which connects a lower portion of the third ladder portion to the bridging portion when the ladder is in a non-operational position wherein the connection mechanism (23F, 23G) connects the third ladder portion to the second ladder portion such that the third ladder portion can switch between an operational position in which the lower end of the third ladder portion is adjacent to the lower end of the second ladder portion, and wherein an upper portion of the second ladder portion is fixedly connected to an upper portion of the third ladder portion by the first snap connector, and the non-operational position in which the lower end of the third ladder portion is spaced apart from the lower end of the second ladder portion in a direction toward the upper end of the second ladder portion.