The 19-year-old Edmonton Oilers centre had collected eight assists in the first nine games of the tournament, but was one of just two Canadian forwards not to have recorded a goal coming into the gold-medal game.
Ellis, who joined the team after the Nashville Predators were eliminated from the National Hockey League playoffs, scored the game-winning goal in a 4-3 victory that was closer than it probably should have been.
The reigning world champion broke on top in the first period, building a lead on goals by Brendan Gallagher and 8:59 and Brad Marchand at 18:02 to go to the first intermission up 2-0. Auston Matthews, David Warsofsky and Tyler Motte scored goals for the United States.in a span of 7:11 in the second period.
CSKA Moscow centre Ivan Telegin, SKA winger Yevgeni Dadonov and Chicago Blackhawks Artemi Panarin were all on target for Russian Federation in the second while Boston Bruins player Frank Vatrano scored for last year's bronze medallists the USA.
Finland boasted a ideal record of nine victories in all matches they played at this championship in Russian Federation and knocked out the hosts 3-1 on Saturday in a semifinal match on Saturday to roam into the deciding match for the title.
Koskinen made 31 saves for the Finns.
Pavel Datsyuk played almost 21 minutes and Alexey Marchenko almost a dozen in Russia's 3-1 loss to Finland in the day's first semifinal. They fell one game short, but draft-eligible rising star Laine was named the tournament's most valuable player.
Finland goaltender Mikko Koskinen stood firm in the third period, making 28 saves in the game to take them to the final.
This is the first time that Canada's won back-to-back gold medals at the worlds since 2003-2004.
Dylan Larkin continued to shine with two assists today, but the USA lost, 4-3, to Canada in a semifinal in Moscow.
"We used our speed more, we came up with numbers, we made sure we got it deep and we played them in the O-zone", Duchene said.
Predators defenseman Mattias Ekholm also participated in the World Championship, posting one goal in two games for Team Sweden. It then ousted the Czech Republic 2-1 in a quarterfinal shootout Thursday and led Canada 3-2 before falling 4-3 in the semifinals Saturday.
Canda's clash with Finland on Sunday will be a repeat of the final game in Group B, which saw the Finns thrash them 4-0.
Earlier, host nation Russian Federation won the bronze medal with a crushing 7-2 win over the United States.
Ellis, who joined the team after the Nashville Predators were eliminated from the National Hockey League playoffs, scored the game-winning goal in a 4-3 victory that was closer than it probably should have been.
The reigning world champion broke on top in the first period, building a lead on goals by Brendan Gallagher and 8:59 and Brad Marchand at 18:02 to go to the first intermission up 2-0. Auston Matthews, David Warsofsky and Tyler Motte scored goals for the United States.in a span of 7:11 in the second period.
CSKA Moscow centre Ivan Telegin, SKA winger Yevgeni Dadonov and Chicago Blackhawks Artemi Panarin were all on target for Russian Federation in the second while Boston Bruins player Frank Vatrano scored for last year's bronze medallists the USA.
Finland boasted a ideal record of nine victories in all matches they played at this championship in Russian Federation and knocked out the hosts 3-1 on Saturday in a semifinal match on Saturday to roam into the deciding match for the title.
Koskinen made 31 saves for the Finns.
Pavel Datsyuk played almost 21 minutes and Alexey Marchenko almost a dozen in Russia's 3-1 loss to Finland in the day's first semifinal. They fell one game short, but draft-eligible rising star Laine was named the tournament's most valuable player.
Finland goaltender Mikko Koskinen stood firm in the third period, making 28 saves in the game to take them to the final.
This is the first time that Canada's won back-to-back gold medals at the worlds since 2003-2004.
Dylan Larkin continued to shine with two assists today, but the USA lost, 4-3, to Canada in a semifinal in Moscow.
"We used our speed more, we came up with numbers, we made sure we got it deep and we played them in the O-zone", Duchene said.
Predators defenseman Mattias Ekholm also participated in the World Championship, posting one goal in two games for Team Sweden. It then ousted the Czech Republic 2-1 in a quarterfinal shootout Thursday and led Canada 3-2 before falling 4-3 in the semifinals Saturday.
Canda's clash with Finland on Sunday will be a repeat of the final game in Group B, which saw the Finns thrash them 4-0.
Earlier, host nation Russian Federation won the bronze medal with a crushing 7-2 win over the United States.