The pair have scored 23 goals between them this season and established themselves as Walter Smith's number one pairing.

Boyd yesterday credited the hard work of Miller as a major factor in his recent prolific streak of 12 goals in 10 games.

And Miller believes their alliance will continue to improve.

"It's been the most productive, definitely," the former Celtic and Hibernian striker said.

"Over the last seven, eight games there have been a lot of goals flying in. Mostly for big Boydy right enough, but I'm enjoying my football.

"We are playing some cracking stuff and obviously me and Boydy rely on service from the midfield and they have been fantastic this season."

Miller added: "It's definitely getting better. It takes a while to form a partnership but I've read big Boyd this morning and he says we obviously knew each other from the national team, which has helped.

"We do get on great off the park as well, so I think you are starting to see that in the games and the performances we are putting in."

Boyd claimed Rangers had missed Miller during his three-week spell on the sidelines with a calf injury, when they fell seven points behind Clydesdale Bank Premier League leaders Celtic.

The pair both scored as Miller returned during last week's 7-1 win over Hamilton, which helped cut the gap as the champions lost to Hibs the following day.

But Miller admits Rangers still need to find Celtic's level of consistency if they want to stop his former club clinching a fourth successive title.

"It will be tough," the 28-year-old said. "You don't go on a 12-game winning run if you are not a good team.

"I think there were maybe a lot of games, they said themselves, they have not been playing great.

"But they still won games and and that is the sign of champions.

"That's maybe a consistency we have not quite got as yet. We have not gone on a significant winning run.

"I'm sure we will because we can't keep playing the way we are playing and not win a lot of games."

Rangers have a chance to cut the gap to one point, temporarily at least, when they face Dundee United in tomorrow's lunchtime clash at Tannadice, before Celtic host Hearts.

Miller added: "We have still got a four-point gap to make up and this is another big weekend for us.

"We have a really tough game and, if we can get a result, it puts a wee bit of pressure on Celtic in the afternoon."