Firth is the word in the Lowland Scots language and in English used to denote various coastal waters in Scotland and England. In mainland Scotland it is used to describe a large sea bay, or even a strait. In the Northern Isles it more usually refers to a smaller inlet. It is linguistically cognate to fjord (both from Proto-Germanic *ferþuz) which has a more constrained sense in English; a firth would most likely be called a fjord if it were situated in Scandinavia. Bodies of water named "firths" tend to be more common on the east coast, or in the southwest of the country, although the Firth of Lorn is an exception to this. The Highland coast contains numerous estuaries, straits and inlets of a similar kind, not called "firth", e.g. the Minch, and Loch Torridon; these are often called sea lochs.

A firth is generally the result of ice age glaciation and is very often associated with a large river, where erosion caused by the tidal effects of incoming sea water passing upriver has widened the riverbed into an estuary. Demarcation can be rather vague. The Firth of Clyde is sometimes thought to include the estuary as far upriver as Dumbarton, but the Ordnance Survey map shows the change from river to firth occurring off Port Glasgow, while locally the change is held to be at the Tail of the Bank where the river crosses a sandbar off Greenock at the junction to the Gare Loch, or even further west at Gourock point.

David Firth (born 23 January 1983) is an English animator, video artist, amateur filmmaker, and musician. As a cartoonist Firth's work is largely distributed via the Internet (most notably the popular Adobe Flash animation website Newgrounds, as well as his own personal sites). Several of his various works in cartoon Flash animation, as well as his multiple music videos and works of video art have garnered large followings, and include some of the most acclaimed video series online.

Notable animation sequences from Firth include Salad Fingers, as well as the comedic Burnt Face Man series. A number of Firth's works have been featured on the BBC in the UK, and the BBC has hired Firth on several occasions to work on TV programs and commercials. He also created a flash-series called "Jerry Jackson", which can both be viewed on Newgrounds and his own site, in which a cartoon character ironically pretends to be "a professional animator", even though the animation is intentionally poorly crafted. Jerry Jackson was also based on the people that would write badly written hate comments on his videos, as he would read them, he imagined that they spoke like Jerry Jackson. Firth also created Men from Up the Stairs.

Nicole Mary Kidman, AC (born 20 June 1967) is an Australian actress, singer, film producer, and humanitarian. Kidman began her career in 1983, starring in various Australian film and television productions until her breakthrough in the 1989 thriller Dead Calm. Following several films over the early 1990s, she came to worldwide recognition for her performances in Days of Thunder (1990), Far and Away (1992), and Batman Forever (1995). Kidman followed this with other successful films in the late 1990s. It was her performance in the musical, Moulin Rouge! (2001) which earned Kidman her second Golden Globe Award and first Academy Award nomination for Best Actress. Her performance as Virginia Woolf the following year in the drama film The Hours (2002) received critical acclaim and earned Kidman the Academy Award for Best Actress.

Kidman's other notable films include To Die For (1995), Eyes Wide Shut (1999), Cold Mountain (2003), The Interpreter (2005), and Australia (2008). Her performance in 2010's Rabbit Hole (which she also produced) earned Kidman further accolades including a subsequent Academy Award nomination for Best Actress. Kidman has been a Goodwill Ambassador for UNICEF since 1994 and for UNIFEM since 2006. Kidman's work has earned her a Star on the Hollywood Walk of Fame, three Golden Globe Awards, one BAFTA, and an Academy Award. In 2006, Kidman was made a Companion of the Order of Australia, Australia's highest civilian honor, and was also the highest-paid actress in the motion picture industry. As a result of being born to Australian parents in Hawaii, Kidman has dual citizenship in Australia and the United States.