Ludwig I or Louis I of Upper Bavaria (German: "Ludwig II der Strenge, Herzog von Bayern, Pfalzgraf bei Rhein" ) (13 April 1229 – 2 February 1294) was Duke of Upper Bavaria and Count Palatine of the Rhine from 1253.
 He is known as Ludwig II or Louis II as Duke of Bavaria, and also as Louis the Strict.
 Born in Heidelberg, he was a son of duke Otto II and Agnes of the Palatinate.
 She was a daughter of the Welf Henry V, Count Palatine of the Rhine, her grandfathers were Henry XII the Lion and Conrad of Hohenstaufen.
Ludwig II (German: "Ludwig Otto Friedrich Wilhelm" ; English: Louis Otto Frederick William ; 25 August 1845 – 13 June 1886) was King of Bavaria from 1864 until his death in 1886.
 He is sometimes called the Swan King, Mad King Ludwig or der Märchenkönig (the 'Fairy Tale King').
 He also held the titles of Count Palatine of the Rhine, Duke of Bavaria, Duke of Franconia, and Duke in Swabia.
Ludwig is a 1973 film directed by Italian director Luchino Visconti about the life and death of King Ludwig II of Bavaria.
 Helmut Berger stars as Ludwig, Romy Schneider reprises her role as Empress Elisabeth of Austria (from the 1955 film "Sissi" and its two sequels).
Helmut Berger (] ; born Helmut Steinberger; 29 May 1944) is an Austrian film and television actor.
 He is most famous for his work with Luchino Visconti, particularly in his performance as King Ludwig II of Bavaria in "Ludwig", for which he received a special David di Donatello award, and his performance in "The Damned" for which he was nominated for a Golden Globe Award.
Luitpold, Prince Regent of Bavaria (German: "Prinzregent Luitpold Karl Joseph Wilhelm Ludwig von Bayern" ) (12 March 1821 – 12 December 1912), was the "de facto" ruler of Bavaria from 1886 to 1912, due to the incapacity of his nephews, King Ludwig II for three days and King Otto for 26 years.
Ludwig II is a 2012 film directed by and Marie Noëlle, starring as the younger Bavarian King Ludwig II and Sebastian Schipper as the king in his later years.
Kong Ludvigøyane (English: King Ludwig Islands ) is a small group of islands south of southwestern Edgeøya.
 The group includes Russebuholmane, Arendtsøya, Berentine Island, and Bruhnsøya.
 They form part of Thousand Islands.
 They are named after King Ludwig II (1845–86) of Bavaria, Germany.
 The islands may be the "Hopeless Iles."
 of the Muscovy Company's map (1625).
Ludwig II, King of Bavaria (German: Ludwig der Zweite, König von Bayern) is a 1929 German silent historical film directed by William Dieterle and starring Dieterle, Theodor Loos and Eugen Burg.
 It portrays the life and reign of the monarch Ludwig II who ruled Bavaria from 1864 to 1886.
 It was made at the Bavaria Studios in Geiselgasteig, Munich.
 The production company was the German subsidiary of the American studio Universal Pictures.
Hohenschwangau Castle or Schloss Hohenschwangau (lit: "Upper Swan County Palace") is a 19th-century palace in southern Germany.
 It was the childhood residence of King Ludwig II of Bavaria and was built by his father, King Maximilian II of Bavaria.
 It is located in the German village of Hohenschwangau near the town of Füssen, part of the county of Ostallgäu in southwestern Bavaria, Germany, very close to the border with Austria.
The Romantic Englishwoman is a 1975 British film directed by Joseph Losey and starring Michael Caine, Glenda Jackson, Helmut Berger.
 It marks the feature-length screen debut for Kate Nelligan.
 The screenplay was written by Tom Stoppard and Thomas Wiseman.

Question: What star of "The Romantic Englishwoman" played King Ludwig II of Bavaria in "Ludwig"?
Answer: Helmut Berger